82519691 has 4 divisors (see below), whose sum is σ = 82711584. Its totient is φ = 82327800.

The previous prime is 82519681. The next prime is 82519729. The reversal of 82519691 is 19691528.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82519691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82519601) 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, 95300 + ... + 96161.

It is an arithmetic number, because the mean of its divisors is an integer number (20677896).

Almost surely, 2^82519691 is an apocalyptic number.

82519691 is a deficient number, since it is larger than the sum of its proper divisors (191893).

82519691 is a wasteful number, since it uses less digits than its factorization.

82519691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191892.

The product of its digits is 38880, while the sum is 41.

The square root of 82519691 is about 9084.0349514959. The cubic root of 82519691 is about 435.3640164335.

The spelling of 82519691 in words is "eighty-two million, five hundred nineteen thousand, six hundred ninety-one".