82618819 has 2 divisors, whose sum is σ = 82618820. Its totient is φ = 82618818.

The previous prime is 82618799. The next prime is 82618831. The reversal of 82618819 is 91881628.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82618819 - 2²⁵ = 49064387 is a prime.

It is a super-2 number, since 2×82618819² = 13651738505909522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82618889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41309409 + 41309410.

It is an arithmetic number, because the mean of its divisors is an integer number (41309410).

Almost surely, 2^82618819 is an apocalyptic number.

82618819 is a deficient number, since it is larger than the sum of its proper divisors (1).

82618819 is an equidigital number, since it uses as much as digits as its factorization.

82618819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 43.

The square root of 82618819 is about 9089.4894796133. The cubic root of 82618819 is about 435.5382758307.

The spelling of 82618819 in words is "eighty-two million, six hundred eighteen thousand, eight hundred nineteen".