82154719 has 2 divisors, whose sum is σ = 82154720. Its totient is φ = 82154718.

The previous prime is 82154687. The next prime is 82154753. The reversal of 82154719 is 91745128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82154719 - 2⁵ = 82154687 is a prime.

It is a super-2 number, since 2×82154719² = 13498795707937922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82154789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41077359 + 41077360.

It is an arithmetic number, because the mean of its divisors is an integer number (41077360).

Almost surely, 2^82154719 is an apocalyptic number.

82154719 is a deficient number, since it is larger than the sum of its proper divisors (1).

82154719 is an equidigital number, since it uses as much as digits as its factorization.

82154719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The square root of 82154719 is about 9063.9240398406. The cubic root of 82154719 is about 434.7212182993.

The spelling of 82154719 in words is "eighty-two million, one hundred fifty-four thousand, seven hundred nineteen".