81793196 has 12 divisors (see below), whose sum is σ = 146629560. Its totient is φ = 39899040.

The previous prime is 81793193. The next prime is 81793241. The reversal of 81793196 is 69139718.

It is not an unprimeable number, because it can be changed into a prime (81793193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249206 + ... + 249533.

It is an arithmetic number, because the mean of its divisors is an integer number (12219130).

Almost surely, 2^81793196 is an apocalyptic number.

It is an amenable number.

81793196 is a deficient number, since it is larger than the sum of its proper divisors (64836364).

81793196 is a wasteful number, since it uses less digits than its factorization.

81793196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498784 (or 498782 counting only the distinct ones).

The product of its digits is 81648, while the sum is 44.

The square root of 81793196 is about 9043.9590888062. The cubic root of 81793196 is about 434.0826150357.

The spelling of 81793196 in words is "eighty-one million, seven hundred ninety-three thousand, one hundred ninety-six".