158986397 has 16 divisors (see below), whose sum is σ = 173238912. Its totient is φ = 145313280.

The previous prime is 158986391. The next prime is 158986403. The reversal of 158986397 is 793689851.

It is an interprime number because it is at equal distance from previous prime (158986391) and next prime (158986403).

It is not a de Polignac number, because 158986397 - 2¹⁰ = 158985373 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 (158986391) 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, 213608 + ... + 214350.

It is an arithmetic number, because the mean of its divisors is an integer number (10827432).

Almost surely, 2^158986397 is an apocalyptic number.

158986397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

158986397 is a deficient number, since it is larger than the sum of its proper divisors (14252515).

158986397 is a wasteful number, since it uses less digits than its factorization.

158986397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108.

The product of its digits is 3265920, while the sum is 56.

The square root of 158986397 is about 12608.9808073452. The cubic root of 158986397 is about 541.7347015240.

The spelling of 158986397 in words is "one hundred fifty-eight million, nine hundred eighty-six thousand, three hundred ninety-seven".