149565023 has 2 divisors, whose sum is σ = 149565024. Its totient is φ = 149565022.

The previous prime is 149565019. The next prime is 149565037. The reversal of 149565023 is 320565941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149565023 - 2² = 149565019 is a prime.

It is a super-2 number, since 2×149565023² = 44739392209981058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149561023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74782511 + 74782512.

It is an arithmetic number, because the mean of its divisors is an integer number (74782512).

Almost surely, 2^149565023 is an apocalyptic number.

149565023 is a deficient number, since it is larger than the sum of its proper divisors (1).

149565023 is an equidigital number, since it uses as much as digits as its factorization.

149565023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 149565023 is about 12229.6779597829. The cubic root of 149565023 is about 530.8151961932.

The spelling of 149565023 in words is "one hundred forty-nine million, five hundred sixty-five thousand, twenty-three".