158944889 has 2 divisors, whose sum is σ = 158944890. Its totient is φ = 158944888.

The previous prime is 158944847. The next prime is 158944901. The reversal of 158944889 is 988449851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119355625 + 39589264 = 10925^2 + 6292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158944889 is a prime.

It is not a weakly prime, because it can be changed into another prime (158944189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79472444 + 79472445.

It is an arithmetic number, because the mean of its divisors is an integer number (79472445).

Almost surely, 2^158944889 is an apocalyptic number.

It is an amenable number.

158944889 is a deficient number, since it is larger than the sum of its proper divisors (1).

158944889 is an equidigital number, since it uses as much as digits as its factorization.

158944889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3317760, while the sum is 56.

The square root of 158944889 is about 12607.3347302275. The cubic root of 158944889 is about 541.6875522466.

The spelling of 158944889 in words is "one hundred fifty-eight million, nine hundred forty-four thousand, eight hundred eighty-nine".