869100889 has 2 divisors, whose sum is σ = 869100890. Its totient is φ = 869100888.

The previous prime is 869100863. The next prime is 869100901. The reversal of 869100889 is 988001968.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640849225 + 228251664 = 25315^2 + 15108^2 .

It is a cyclic number.

It is not a de Polignac number, because 869100889 - 2⁷ = 869100761 is a prime.

It is not a weakly prime, because it can be changed into another prime (869100389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434550444 + 434550445.

It is an arithmetic number, because the mean of its divisors is an integer number (434550445).

Almost surely, 2^869100889 is an apocalyptic number.

It is an amenable number.

869100889 is a deficient number, since it is larger than the sum of its proper divisors (1).

869100889 is an equidigital number, since it uses as much as digits as its factorization.

869100889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 869100889 is about 29480.5171087618. The cubic root of 869100889 is about 954.3112964451.

The spelling of 869100889 in words is "eight hundred sixty-nine million, one hundred thousand, eight hundred eighty-nine".