81792903 has 16 divisors (see below), whose sum is σ = 113013216. Its totient is φ = 52577280.

The previous prime is 81792901. The next prime is 81792913. The reversal of 81792903 is 30929718.

It is not a de Polignac number, because 81792903 - 2¹ = 81792901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81792901) 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, 9283 + ... + 15803.

It is an arithmetic number, because the mean of its divisors is an integer number (7063326).

Almost surely, 2^81792903 is an apocalyptic number.

81792903 is a deficient number, since it is larger than the sum of its proper divisors (31220313).

81792903 is a wasteful number, since it uses less digits than its factorization.

81792903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6674.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 81792903 is about 9043.9428901337. The cubic root of 81792903 is about 434.0820967107.

The spelling of 81792903 in words is "eighty-one million, seven hundred ninety-two thousand, nine hundred three".