860984989 has 2 divisors, whose sum is σ = 860984990. Its totient is φ = 860984988.

The previous prime is 860984951. The next prime is 860985011. The reversal of 860984989 is 989489068.

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., 811395225 + 49589764 = 28485^2 + 7042^2 .

It is a cyclic number.

It is not a de Polignac number, because 860984989 - 2⁹ = 860984477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860984489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430492494 + 430492495.

It is an arithmetic number, because the mean of its divisors is an integer number (430492495).

Almost surely, 2^860984989 is an apocalyptic number.

It is an amenable number.

860984989 is a deficient number, since it is larger than the sum of its proper divisors (1).

860984989 is an equidigital number, since it uses as much as digits as its factorization.

860984989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8957952, while the sum is 61.

The square root of 860984989 is about 29342.5457143718. The cubic root of 860984989 is about 951.3314623020.

The spelling of 860984989 in words is "eight hundred sixty million, nine hundred eighty-four thousand, nine hundred eighty-nine".