82691051 has 4 divisors (see below), whose sum is σ = 84046704. Its totient is φ = 81335400.

The previous prime is 82691047. The next prime is 82691053. The reversal of 82691051 is 15019628.

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 82691051 - 2² = 82691047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82690999 and 82691017.

It is not an unprimeable number, because it can be changed into a prime (82691053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677735 + ... + 677856.

It is an arithmetic number, because the mean of its divisors is an integer number (21011676).

Almost surely, 2^82691051 is an apocalyptic number.

82691051 is a deficient number, since it is larger than the sum of its proper divisors (1355653).

82691051 is a wasteful number, since it uses less digits than its factorization.

82691051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355652.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 82691051 is about 9093.4619920028. The cubic root of 82691051 is about 435.6651663598.

The spelling of 82691051 in words is "eighty-two million, six hundred ninety-one thousand, fifty-one".