82390613 has 2 divisors, whose sum is σ = 82390614. Its totient is φ = 82390612.

The previous prime is 82390597. The next prime is 82390621. The reversal of 82390613 is 31609328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75030244 + 7360369 = 8662^2 + 2713^2 .

It is a cyclic number.

It is not a de Polignac number, because 82390613 - 2⁴ = 82390597 is a prime.

It is a super-2 number, since 2×82390613² = 13576426221031538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82390613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82300613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41195306 + 41195307.

It is an arithmetic number, because the mean of its divisors is an integer number (41195307).

Almost surely, 2^82390613 is an apocalyptic number.

It is an amenable number.

82390613 is a deficient number, since it is larger than the sum of its proper divisors (1).

82390613 is an equidigital number, since it uses as much as digits as its factorization.

82390613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 82390613 is about 9076.9275087994. The cubic root of 82390613 is about 435.1368979440.

The spelling of 82390613 in words is "eighty-two million, three hundred ninety thousand, six hundred thirteen".