84590839 has 2 divisors, whose sum is σ = 84590840. Its totient is φ = 84590838.

The previous prime is 84590819. The next prime is 84590879. The reversal of 84590839 is 93809548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84590839 - 2⁹ = 84590327 is a prime.

It is a super-2 number, since 2×84590839² = 14311220085447842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84590819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42295419 + 42295420.

It is an arithmetic number, because the mean of its divisors is an integer number (42295420).

Almost surely, 2^84590839 is an apocalyptic number.

84590839 is a deficient number, since it is larger than the sum of its proper divisors (1).

84590839 is an equidigital number, since it uses as much as digits as its factorization.

84590839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 84590839 is about 9197.3278184481. The cubic root of 84590839 is about 438.9763375771.

The spelling of 84590839 in words is "eighty-four million, five hundred ninety thousand, eight hundred thirty-nine".