130093781 has 4 divisors (see below), whose sum is σ = 131435052. Its totient is φ = 128752512.

The previous prime is 130093753. The next prime is 130093787. The reversal of 130093781 is 187390031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187390031 = 17 ⋅11022943.

It can be written as a sum of positive squares in 2 ways, for example, as 35343025 + 94750756 = 5945^2 + 9734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130093781 is a prime.

It is a super-2 number, since 2×130093781² = 33848783709751922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130093787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670490 + ... + 670683.

It is an arithmetic number, because the mean of its divisors is an integer number (32858763).

Almost surely, 2^130093781 is an apocalyptic number.

It is an amenable number.

130093781 is a deficient number, since it is larger than the sum of its proper divisors (1341271).

130093781 is an equidigital number, since it uses as much as digits as its factorization.

130093781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341270.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 130093781 is about 11405.8660784703. The cubic root of 130093781 is about 506.7014868633.

The spelling of 130093781 in words is "one hundred thirty million, ninety-three thousand, seven hundred eighty-one".