88978639 has 2 divisors, whose sum is σ = 88978640. Its totient is φ = 88978638.

The previous prime is 88978633. The next prime is 88978717. The reversal of 88978639 is 93687988.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 88978639 - 2⁷ = 88978511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88978633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44489319 + 44489320.

It is an arithmetic number, because the mean of its divisors is an integer number (44489320).

Almost surely, 2^88978639 is an apocalyptic number.

88978639 is a deficient number, since it is larger than the sum of its proper divisors (1).

88978639 is an equidigital number, since it uses as much as digits as its factorization.

88978639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 58.

The square root of 88978639 is about 9432.8489333817. The cubic root of 88978639 is about 446.4387870674.

The spelling of 88978639 in words is "eighty-eight million, nine hundred seventy-eight thousand, six hundred thirty-nine".