158917407 has 16 divisors (see below), whose sum is σ = 233068800. Its totient is φ = 96311160.

The previous prime is 158917391. The next prime is 158917469. The reversal of 158917407 is 704719851.

It is not a de Polignac number, because 158917407 - 2⁴ = 158917391 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158917307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15907 + ... + 23892.

It is an arithmetic number, because the mean of its divisors is an integer number (14566800).

Almost surely, 2^158917407 is an apocalyptic number.

158917407 is a deficient number, since it is larger than the sum of its proper divisors (74151393).

158917407 is an equidigital number, since it uses as much as digits as its factorization.

158917407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39835 (or 39813 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 42.

The square root of 158917407 is about 12606.2447620217. The cubic root of 158917407 is about 541.6563307009.

The spelling of 158917407 in words is "one hundred fifty-eight million, nine hundred seventeen thousand, four hundred seven".