88390639 has 2 divisors, whose sum is σ = 88390640. Its totient is φ = 88390638.

The previous prime is 88390609. The next prime is 88390649. The reversal of 88390639 is 93609388.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 88390639 - 2¹⁹ = 87866351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88390609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44195319 + 44195320.

It is an arithmetic number, because the mean of its divisors is an integer number (44195320).

Almost surely, 2^88390639 is an apocalyptic number.

88390639 is a deficient number, since it is larger than the sum of its proper divisors (1).

88390639 is an equidigital number, since it uses as much as digits as its factorization.

88390639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 88390639 is about 9401.6295927887. The cubic root of 88390639 is about 445.4532082665.

The spelling of 88390639 in words is "eighty-eight million, three hundred ninety thousand, six hundred thirty-nine".