82993511 has 4 divisors (see below), whose sum is σ = 83428224. Its totient is φ = 82558800.

The previous prime is 82993487. The next prime is 82993513. The reversal of 82993511 is 11539928.

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 82993511 - 2²² = 78799207 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 (82993513) 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, 217070 + ... + 217451.

It is an arithmetic number, because the mean of its divisors is an integer number (20857056).

Almost surely, 2^82993511 is an apocalyptic number.

82993511 is a deficient number, since it is larger than the sum of its proper divisors (434713).

82993511 is a wasteful number, since it uses less digits than its factorization.

82993511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434712.

The product of its digits is 19440, while the sum is 38.

The square root of 82993511 is about 9110.0774420419. The cubic root of 82993511 is about 436.1956991879.

The spelling of 82993511 in words is "eighty-two million, nine hundred ninety-three thousand, five hundred eleven".