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145371899 = 1391045841
BaseRepresentation
bin10001010101000…
…11001011111011
3101010112122202102
420222203023323
5244203400044
622231454015
73413432531
oct1052431373
9333478672
10145371899
1175071072
124082730b
132416b49a
1415442151
15cb6824e
hex8aa32fb

145371899 has 4 divisors (see below), whose sum is σ = 146417880. Its totient is φ = 144325920.

The previous prime is 145371881. The next prime is 145371931. The reversal of 145371899 is 998173541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998173541 = 3013933119.

It is a cyclic number.

It is not a de Polignac number, because 145371899 - 28 = 145371643 is a prime.

It is a super-2 number, since 2×1453718992 = 42265978037732402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145371859) 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, 522782 + ... + 523059.

It is an arithmetic number, because the mean of its divisors is an integer number (36604470).

Almost surely, 2145371899 is an apocalyptic number.

145371899 is a deficient number, since it is larger than the sum of its proper divisors (1045981).

145371899 is a wasteful number, since it uses less digits than its factorization.

145371899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045980.

The product of its digits is 272160, while the sum is 47.

The square root of 145371899 is about 12057.0269552655. The cubic root of 145371899 is about 525.8075541611.

The spelling of 145371899 in words is "one hundred forty-five million, three hundred seventy-one thousand, eight hundred ninety-nine".

Divisors: 1 139 1045841 145371899