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130958381 = 145989759
BaseRepresentation
bin1111100111001…
…00010000101101
3100010102101010102
413303210100231
5232011132011
620554520445
73150061601
oct763442055
9303371112
10130958381
1167a16a74
1237a36125
1321192a88
141356d501
15b76c73b
hex7ce442d

130958381 has 4 divisors (see below), whose sum is σ = 131049600. Its totient is φ = 130867164.

The previous prime is 130958357. The next prime is 130958383. The reversal of 130958381 is 183859031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183859031 = 374969163.

It is a cyclic number.

It is not a de Polignac number, because 130958381 - 210 = 130957357 is a prime.

It is a super-2 number, since 2×1309583812 = 34300195108282322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130958383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43421 + ... + 46338.

It is an arithmetic number, because the mean of its divisors is an integer number (32762400).

Almost surely, 2130958381 is an apocalyptic number.

It is an amenable number.

130958381 is a deficient number, since it is larger than the sum of its proper divisors (91219).

130958381 is an equidigital number, since it uses as much as digits as its factorization.

130958381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91218.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 130958381 is about 11443.7048633736. The cubic root of 130958381 is about 507.8215177337.

The spelling of 130958381 in words is "one hundred thirty million, nine hundred fifty-eight thousand, three hundred eighty-one".

Divisors: 1 1459 89759 130958381