39156889 has 2 divisors, whose sum is σ = 39156890. Its totient is φ = 39156888.

The previous prime is 39156883. The next prime is 39156907. The reversal of 39156889 is 98865193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23116864 + 16040025 = 4808^2 + 4005^2 .

It is a cyclic number.

It is not a de Polignac number, because 39156889 - 2³ = 39156881 is a prime.

It is not a weakly prime, because it can be changed into another prime (39156881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19578444 + 19578445.

It is an arithmetic number, because the mean of its divisors is an integer number (19578445).

Almost surely, 2^39156889 is an apocalyptic number.

It is an amenable number.

39156889 is a deficient number, since it is larger than the sum of its proper divisors (1).

39156889 is an equidigital number, since it uses as much as digits as its factorization.

39156889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 49.

The square root of 39156889 is about 6257.5465639498. The cubic root of 39156889 is about 339.5752741544.

The spelling of 39156889 in words is "thirty-nine million, one hundred fifty-six thousand, eight hundred eighty-nine".