81490982 has 8 divisors (see below), whose sum is σ = 122669256. Its totient is φ = 40601232.

The previous prime is 81490973. The next prime is 81491009. The reversal of 81490982 is 28909418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71423 + ... + 72554.

It is an arithmetic number, because the mean of its divisors is an integer number (15333657).

Almost surely, 2^81490982 is an apocalyptic number.

81490982 is a deficient number, since it is larger than the sum of its proper divisors (41178274).

81490982 is a wasteful number, since it uses less digits than its factorization.

81490982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144262.

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

The square root of 81490982 is about 9027.2355679909. The cubic root of 81490982 is about 433.5473311196.

The spelling of 81490982 in words is "eighty-one million, four hundred ninety thousand, nine hundred eighty-two".