158881397 has 2 divisors, whose sum is σ = 158881398. Its totient is φ = 158881396.

The previous prime is 158881391. The next prime is 158881409. The reversal of 158881397 is 793188851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87123556 + 71757841 = 9334^2 + 8471^2 .

It is a cyclic number.

It is not a de Polignac number, because 158881397 - 2⁸ = 158881141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158881391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79440698 + 79440699.

It is an arithmetic number, because the mean of its divisors is an integer number (79440699).

Almost surely, 2^158881397 is an apocalyptic number.

It is an amenable number.

158881397 is a deficient number, since it is larger than the sum of its proper divisors (1).

158881397 is an equidigital number, since it uses as much as digits as its factorization.

158881397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 50.

The square root of 158881397 is about 12604.8164207179. The cubic root of 158881397 is about 541.6154152797.

The spelling of 158881397 in words is "one hundred fifty-eight million, eight hundred eighty-one thousand, three hundred ninety-seven".