158971907 has 4 divisors (see below), whose sum is σ = 162354336. Its totient is φ = 155589480.

The previous prime is 158971877. The next prime is 158971961. The reversal of 158971907 is 709179851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 158971907 - 2⁶ = 158971843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 3382381 = 158971907 / (1 + 5 + 8 + 9 + 7 + 1 + 9 + 0 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158971987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691144 + ... + 1691237.

It is an arithmetic number, because the mean of its divisors is an integer number (40588584).

Almost surely, 2^158971907 is an apocalyptic number.

158971907 is a deficient number, since it is larger than the sum of its proper divisors (3382429).

158971907 is an equidigital number, since it uses as much as digits as its factorization.

158971907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382428.

The product of its (nonzero) digits is 158760, while the sum is 47.

The square root of 158971907 is about 12608.4062037991. The cubic root of 158971907 is about 541.7182431467.

The spelling of 158971907 in words is "one hundred fifty-eight million, nine hundred seventy-one thousand, nine hundred seven".