81292982 has 16 divisors (see below), whose sum is σ = 128908800. Its totient is φ = 38341800.

The previous prime is 81292969. The next prime is 81292987. The reversal of 81292982 is 28929218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81292987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4607 + ... + 13557.

It is an arithmetic number, because the mean of its divisors is an integer number (8056800).

Almost surely, 2^81292982 is an apocalyptic number.

81292982 is a deficient number, since it is larger than the sum of its proper divisors (47615818).

81292982 is a wasteful number, since it uses less digits than its factorization.

81292982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9211.

The product of its digits is 41472, while the sum is 41.

The square root of 81292982 is about 9016.2620858092. The cubic root of 81292982 is about 433.1959139539.

It can be divided in two parts, 8129 and 2982, that added together give a palindrome (11111).

The spelling of 81292982 in words is "eighty-one million, two hundred ninety-two thousand, nine hundred eighty-two".