82813791 has 16 divisors (see below), whose sum is σ = 111604320. Its totient is φ = 54620160.

The previous prime is 82813789. The next prime is 82813793. The reversal of 82813791 is 19731828.

It is an interprime number because it is at equal distance from previous prime (82813789) and next prime (82813793).

It is not a de Polignac number, because 82813791 - 2¹ = 82813789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82813793) 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, 162445 + ... + 162953.

It is an arithmetic number, because the mean of its divisors is an integer number (6975270).

Almost surely, 2^82813791 is an apocalyptic number.

82813791 is a deficient number, since it is larger than the sum of its proper divisors (28790529).

82813791 is a wasteful number, since it uses less digits than its factorization.

82813791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its digits is 24192, while the sum is 39.

The square root of 82813791 is about 9100.2082943194. The cubic root of 82813791 is about 435.8806153368.

The spelling of 82813791 in words is "eighty-two million, eight hundred thirteen thousand, seven hundred ninety-one".