150938991 has 32 divisors (see below), whose sum is σ = 256158720. Its totient is φ = 86048352.

The previous prime is 150938989. The next prime is 150938993. The reversal of 150938991 is 199839051.

It is an interprime number because it is at equal distance from previous prime (150938989) and next prime (150938993).

It is not a de Polignac number, because 150938991 - 2¹ = 150938989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150938993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122806 + ... + 124028.

It is an arithmetic number, because the mean of its divisors is an integer number (8004960).

Almost surely, 2^150938991 is an apocalyptic number.

150938991 is a deficient number, since it is larger than the sum of its proper divisors (105219729).

150938991 is a wasteful number, since it uses less digits than its factorization.

150938991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892 (or 1886 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 150938991 is about 12285.7230556447. The cubic root of 150938991 is about 532.4356756263.

The spelling of 150938991 in words is "one hundred fifty million, nine hundred thirty-eight thousand, nine hundred ninety-one".