82491959 has 16 divisors (see below), whose sum is σ = 92637216. Its totient is φ = 72806400.

The previous prime is 82491923. The next prime is 82491967. The reversal of 82491959 is 95919428.

It is a cyclic number.

It is not a de Polignac number, because 82491959 - 2¹² = 82487863 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 (82491919) 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, 142679 + ... + 143255.

It is an arithmetic number, because the mean of its divisors is an integer number (5789826).

Almost surely, 2^82491959 is an apocalyptic number.

82491959 is a deficient number, since it is larger than the sum of its proper divisors (10145257).

82491959 is a wasteful number, since it uses less digits than its factorization.

82491959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946.

The product of its digits is 233280, while the sum is 47.

The square root of 82491959 is about 9082.5084090245. The cubic root of 82491959 is about 435.3152407311.

The spelling of 82491959 in words is "eighty-two million, four hundred ninety-one thousand, nine hundred fifty-nine".