82996567421 has 2 divisors, whose sum is σ = 82996567422. Its totient is φ = 82996567420.

The previous prime is 82996567417. The next prime is 82996567477. The reversal of 82996567421 is 12476569928.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61114761796 + 21881805625 = 247214^2 + 147925^2 .

It is a cyclic number.

It is not a de Polignac number, because 82996567421 - 2² = 82996567417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82996567321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41498283710 + 41498283711.

It is an arithmetic number, because the mean of its divisors is an integer number (41498283711).

Almost surely, 2^82996567421 is an apocalyptic number.

It is an amenable number.

82996567421 is a deficient number, since it is larger than the sum of its proper divisors (1).

82996567421 is an equidigital number, since it uses as much as digits as its factorization.

82996567421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 59.

The spelling of 82996567421 in words is "eighty-two billion, nine hundred ninety-six million, five hundred sixty-seven thousand, four hundred twenty-one".