158936491 has 4 divisors (see below), whose sum is σ = 181641712. Its totient is φ = 136231272.

The previous prime is 158936489. The next prime is 158936507. The reversal of 158936491 is 194639851.

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 158936491 - 2¹ = 158936489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158936441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11352600 + ... + 11352613.

It is an arithmetic number, because the mean of its divisors is an integer number (45410428).

Almost surely, 2^158936491 is an apocalyptic number.

158936491 is a deficient number, since it is larger than the sum of its proper divisors (22705221).

158936491 is an equidigital number, since it uses as much as digits as its factorization.

158936491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22705220.

The product of its digits is 233280, while the sum is 46.

The square root of 158936491 is about 12607.0016657411. The cubic root of 158936491 is about 541.6780118912.

The spelling of 158936491 in words is "one hundred fifty-eight million, nine hundred thirty-six thousand, four hundred ninety-one".