158977391 has 8 divisors (see below), whose sum is σ = 164957520. Its totient is φ = 153030528.

The previous prime is 158977361. The next prime is 158977397. The reversal of 158977391 is 193779851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158977391 - 2¹⁴ = 158961007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158977397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1640 + ... + 17906.

It is an arithmetic number, because the mean of its divisors is an integer number (20619690).

Almost surely, 2^158977391 is an apocalyptic number.

158977391 is a deficient number, since it is larger than the sum of its proper divisors (5980129).

158977391 is a wasteful number, since it uses less digits than its factorization.

158977391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16633.

The product of its digits is 476280, while the sum is 50.

The square root of 158977391 is about 12608.6236758815. The cubic root of 158977391 is about 541.7244722319.

The spelling of 158977391 in words is "one hundred fifty-eight million, nine hundred seventy-seven thousand, three hundred ninety-one".