82979511 has 4 divisors (see below), whose sum is σ = 110639352. Its totient is φ = 55319672.

The previous prime is 82979497. The next prime is 82979513. The reversal of 82979511 is 11597928.

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-82979511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82979513) 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, 13829916 + ... + 13829921.

It is an arithmetic number, because the mean of its divisors is an integer number (27659838).

Almost surely, 2^82979511 is an apocalyptic number.

82979511 is a deficient number, since it is larger than the sum of its proper divisors (27659841).

82979511 is a wasteful number, since it uses less digits than its factorization.

82979511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27659840.

The product of its digits is 45360, while the sum is 42.

The square root of 82979511 is about 9109.3090297783. The cubic root of 82979511 is about 436.1711708318.

The spelling of 82979511 in words is "eighty-two million, nine hundred seventy-nine thousand, five hundred eleven".