82390009469 has 2 divisors, whose sum is σ = 82390009470. Its totient is φ = 82390009468.

The previous prime is 82390009349. The next prime is 82390009483. The reversal of 82390009469 is 96490009328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75073260025 + 7316749444 = 273995^2 + 85538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82390009469 is a prime.

It is a super-2 number, since 2×82390009469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82390006469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41195004734 + 41195004735.

It is an arithmetic number, because the mean of its divisors is an integer number (41195004735).

Almost surely, 2^82390009469 is an apocalyptic number.

It is an amenable number.

82390009469 is a deficient number, since it is larger than the sum of its proper divisors (1).

82390009469 is an equidigital number, since it uses as much as digits as its factorization.

82390009469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 82390009469 in words is "eighty-two billion, three hundred ninety million, nine thousand, four hundred sixty-nine".