82390239369 has 21 divisors (see below), whose sum is σ = 123540470749. Its totient is φ = 54921659580.

The previous prime is 82390239361. The next prime is 82390239377. The reversal of 82390239369 is 96393209328.

The square root of 82390239369 is 287037.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (82390239361) and next prime (82390239377).

It is not a de Polignac number, because 82390239369 - 2³ = 82390239361 is a prime.

It is a super-2 number, since 2×82390239369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82390239361) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 7744684 + ... + 7755314.

Almost surely, 2^82390239369 is an apocalyptic number.

82390239369 is the 287037-th square number.

82390239369 is the 143519-th centered octagonal number.

It is an amenable number.

82390239369 is a deficient number, since it is larger than the sum of its proper divisors (41150231380).

82390239369 is an frugal number, since it uses more digits than its factorization.

82390239369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21280 (or 10634 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 54.

The spelling of 82390239369 in words is "eighty-two billion, three hundred ninety million, two hundred thirty-nine thousand, three hundred sixty-nine".