82404591931 has 2 divisors, whose sum is σ = 82404591932. Its totient is φ = 82404591930.

The previous prime is 82404591811. The next prime is 82404591989. The reversal of 82404591931 is 13919540428.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82404591931 - 2¹³ = 82404583739 is a prime.

It is a super-4 number, since 4×82404591931⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (82404531931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41202295965 + 41202295966.

It is an arithmetic number, because the mean of its divisors is an integer number (41202295966).

Almost surely, 2^82404591931 is an apocalyptic number.

82404591931 is a deficient number, since it is larger than the sum of its proper divisors (1).

82404591931 is an equidigital number, since it uses as much as digits as its factorization.

82404591931 is an evil number, because the sum of its binary digits is even.

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

The spelling of 82404591931 in words is "eighty-two billion, four hundred four million, five hundred ninety-one thousand, nine hundred thirty-one".