149868931 has 2 divisors, whose sum is σ = 149868932. Its totient is φ = 149868930.

The previous prime is 149868919. The next prime is 149868949. The reversal of 149868931 is 139868941.

149868931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149868931 - 2⁹ = 149868419 is a prime.

It is a super-2 number, since 2×149868931² = 44921392958165522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (149869931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74934465 + 74934466.

It is an arithmetic number, because the mean of its divisors is an integer number (74934466).

Almost surely, 2^149868931 is an apocalyptic number.

149868931 is a deficient number, since it is larger than the sum of its proper divisors (1).

149868931 is an equidigital number, since it uses as much as digits as its factorization.

149868931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 149868931 is about 12242.0966749981. The cubic root of 149868931 is about 531.1744821652.

The spelling of 149868931 in words is "one hundred forty-nine million, eight hundred sixty-eight thousand, nine hundred thirty-one".