158131397 has 2 divisors, whose sum is σ = 158131398. Its totient is φ = 158131396.

The previous prime is 158131367. The next prime is 158131429. The reversal of 158131397 is 793131851.

158131397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158105476 + 25921 = 12574^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 158131397 - 2⁶ = 158131333 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 158131397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158131327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79065698 + 79065699.

It is an arithmetic number, because the mean of its divisors is an integer number (79065699).

Almost surely, 2^158131397 is an apocalyptic number.

It is an amenable number.

158131397 is a deficient number, since it is larger than the sum of its proper divisors (1).

158131397 is an equidigital number, since it uses as much as digits as its factorization.

158131397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 38.

The square root of 158131397 is about 12575.0306957876. The cubic root of 158131397 is about 540.7618384925.

The spelling of 158131397 in words is "one hundred fifty-eight million, one hundred thirty-one thousand, three hundred ninety-seven".