158984391 has 12 divisors (see below), whose sum is σ = 225183272. Its totient is φ = 99754368.

The previous prime is 158984387. The next prime is 158984393. The reversal of 158984391 is 193489851.

It is not a de Polignac number, because 158984391 - 2² = 158984387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158984391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158984393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90820 + ... + 92553.

Almost surely, 2^158984391 is an apocalyptic number.

158984391 is a deficient number, since it is larger than the sum of its proper divisors (66198881).

158984391 is a wasteful number, since it uses less digits than its factorization.

158984391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183410 (or 183393 counting only the distinct ones).

The product of its digits is 311040, while the sum is 48.

The square root of 158984391 is about 12608.9012606174. The cubic root of 158984391 is about 541.7324230809.

The spelling of 158984391 in words is "one hundred fifty-eight million, nine hundred eighty-four thousand, three hundred ninety-one".