149645431 has 16 divisors (see below), whose sum is σ = 163981440. Its totient is φ = 135732960.

The previous prime is 149645399. The next prime is 149645453. The reversal of 149645431 is 134546941.

It is a cyclic number.

It is not a de Polignac number, because 149645431 - 2⁵ = 149645399 is a prime.

It is a super-2 number, since 2×149645431² = 44787510038351522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149645471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356940 + ... + 357358.

It is an arithmetic number, because the mean of its divisors is an integer number (10248840).

Almost surely, 2^149645431 is an apocalyptic number.

149645431 is a deficient number, since it is larger than the sum of its proper divisors (14336009).

149645431 is a wasteful number, since it uses less digits than its factorization.

149645431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846.

The product of its digits is 51840, while the sum is 37.

The square root of 149645431 is about 12232.9649308743. The cubic root of 149645431 is about 530.9103034158.

The spelling of 149645431 in words is "one hundred forty-nine million, six hundred forty-five thousand, four hundred thirty-one".