82576391 has 4 divisors (see below), whose sum is σ = 83427792. Its totient is φ = 81724992.

The previous prime is 82576387. The next prime is 82576399. The reversal of 82576391 is 19367528.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82576391 - 2² = 82576387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82576399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425555 + ... + 425748.

It is an arithmetic number, because the mean of its divisors is an integer number (20856948).

Almost surely, 2^82576391 is an apocalyptic number.

82576391 is a deficient number, since it is larger than the sum of its proper divisors (851401).

82576391 is an equidigital number, since it uses as much as digits as its factorization.

82576391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851400.

The product of its digits is 90720, while the sum is 41.

The square root of 82576391 is about 9087.1552754424. The cubic root of 82576391 is about 435.4637077427.

The spelling of 82576391 in words is "eighty-two million, five hundred seventy-six thousand, three hundred ninety-one".