81498908 has 12 divisors (see below), whose sum is σ = 142766400. Its totient is φ = 40708512.

The previous prime is 81498887. The next prime is 81498917. The reversal of 81498908 is 80989418.

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, 5516 + ... + 13907.

It is an arithmetic number, because the mean of its divisors is an integer number (11897200).

Almost surely, 2^81498908 is an apocalyptic number.

It is an amenable number.

81498908 is a deficient number, since it is larger than the sum of its proper divisors (61267492).

81498908 is a wasteful number, since it uses less digits than its factorization.

81498908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20476 (or 20474 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 81498908 is about 9027.6745621450. The cubic root of 81498908 is about 433.5613866002.

The spelling of 81498908 in words is "eighty-one million, four hundred ninety-eight thousand, nine hundred eight".