81073683 has 8 divisors (see below), whose sum is σ = 120109200. Its totient is φ = 54049104.

The previous prime is 81073661. The next prime is 81073691. The reversal of 81073683 is 38637018.

It is not a de Polignac number, because 81073683 - 2²¹ = 78976531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81073613) 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, 1501338 + ... + 1501391.

It is an arithmetic number, because the mean of its divisors is an integer number (15013650).

Almost surely, 2^81073683 is an apocalyptic number.

81073683 is a deficient number, since it is larger than the sum of its proper divisors (39035517).

81073683 is a wasteful number, since it uses less digits than its factorization.

81073683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002738 (or 3002732 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 81073683 is about 9004.0925694931. The cubic root of 81073683 is about 432.8060279665.

The spelling of 81073683 in words is "eighty-one million, seventy-three thousand, six hundred eighty-three".