149309931 has 8 divisors (see below), whose sum is σ = 199957824. Its totient is φ = 99101000.

The previous prime is 149309917. The next prime is 149309939. The reversal of 149309931 is 139903941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149309931 - 2¹³ = 149301739 is a prime.

It is a super-2 number, since 2×149309931² = 44586910990449522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 149309931.

It is not an unprimeable number, because it can be changed into a prime (149309939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108945 + ... + 110306.

It is an arithmetic number, because the mean of its divisors is an integer number (24994728).

Almost surely, 2^149309931 is an apocalyptic number.

149309931 is a deficient number, since it is larger than the sum of its proper divisors (50647893).

149309931 is a wasteful number, since it uses less digits than its factorization.

149309931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219481.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 149309931 is about 12219.2442892349. The cubic root of 149309931 is about 530.5132455505.

The spelling of 149309931 in words is "one hundred forty-nine million, three hundred nine thousand, nine hundred thirty-one".