89876639 has 2 divisors, whose sum is σ = 89876640. Its totient is φ = 89876638.

The previous prime is 89876627. The next prime is 89876659. The reversal of 89876639 is 93667898.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89876639 - 2⁴ = 89876623 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89876659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44938319 + 44938320.

It is an arithmetic number, because the mean of its divisors is an integer number (44938320).

Almost surely, 2^89876639 is an apocalyptic number.

89876639 is a deficient number, since it is larger than the sum of its proper divisors (1).

89876639 is an equidigital number, since it uses as much as digits as its factorization.

89876639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 56.

The square root of 89876639 is about 9480.3290554706. The cubic root of 89876639 is about 447.9356289714.

The spelling of 89876639 in words is "eighty-nine million, eight hundred seventy-six thousand, six hundred thirty-nine".