82503891 has 12 divisors (see below), whose sum is σ = 119695680. Its totient is φ = 54761040.

The previous prime is 82503857. The next prime is 82503893. The reversal of 82503891 is 19830528.

It is not a de Polignac number, because 82503891 - 2⁷ = 82503763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82503893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17955 + ... + 22076.

It is an arithmetic number, because the mean of its divisors is an integer number (9974640).

Almost surely, 2^82503891 is an apocalyptic number.

82503891 is a deficient number, since it is larger than the sum of its proper divisors (37191789).

82503891 is a wasteful number, since it uses less digits than its factorization.

82503891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40266 (or 40263 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 82503891 is about 9083.1652522675. The cubic root of 82503891 is about 435.3362283567.

The spelling of 82503891 in words is "eighty-two million, five hundred three thousand, eight hundred ninety-one".