81498927 has 8 divisors (see below), whose sum is σ = 108814464. Its totient is φ = 54258008.

The previous prime is 81498919. The next prime is 81498931. The reversal of 81498927 is 72989418.

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

It is a cyclic number.

It is not a de Polignac number, because 81498927 - 2³ = 81498919 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81498917) 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, 16053 + ... + 20510.

It is an arithmetic number, because the mean of its divisors is an integer number (13601808).

Almost surely, 2^81498927 is an apocalyptic number.

81498927 is a deficient number, since it is larger than the sum of its proper divisors (27315537).

81498927 is a wasteful number, since it uses less digits than its factorization.

81498927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37309.

The product of its digits is 290304, while the sum is 48.

The square root of 81498927 is about 9027.6756144647. The cubic root of 81498927 is about 433.5614202925.

The spelling of 81498927 in words is "eighty-one million, four hundred ninety-eight thousand, nine hundred twenty-seven".