158971906 has 48 divisors (see below), whose sum is σ = 266289408. Its totient is φ = 71042400.

The previous prime is 158971877. The next prime is 158971961. The reversal of 158971906 is 609179851.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1213461 + ... + 1213591.

It is an arithmetic number, because the mean of its divisors is an integer number (5547696).

Almost surely, 2^158971906 is an apocalyptic number.

158971906 is a deficient number, since it is larger than the sum of its proper divisors (107317502).

158971906 is a wasteful number, since it uses less digits than its factorization.

158971906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 158971906 is about 12608.4061641430. The cubic root of 158971906 is about 541.7182420108.

The spelling of 158971906 in words is "one hundred fifty-eight million, nine hundred seventy-one thousand, nine hundred six".