82957391 has 16 divisors (see below), whose sum is σ = 93139200. Its totient is φ = 73233600.

The previous prime is 82957373. The next prime is 82957403. The reversal of 82957391 is 19375928.

It is not a de Polignac number, because 82957391 - 2¹⁴ = 82941007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82957351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188750 + ... + 189188.

It is an arithmetic number, because the mean of its divisors is an integer number (5821200).

Almost surely, 2^82957391 is an apocalyptic number.

82957391 is a deficient number, since it is larger than the sum of its proper divisors (10181809).

82957391 is a wasteful number, since it uses less digits than its factorization.

82957391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910.

The product of its digits is 136080, while the sum is 44.

The square root of 82957391 is about 9108.0948062699. The cubic root of 82957391 is about 436.1324104052.

The spelling of 82957391 in words is "eighty-two million, nine hundred fifty-seven thousand, three hundred ninety-one".