81046693 has 16 divisors (see below), whose sum is σ = 100880640. Its totient is φ = 63398016.

The previous prime is 81046681. The next prime is 81046703. The reversal of 81046693 is 39664018.

It is a cyclic number.

It is not a de Polignac number, because 81046693 - 2²⁵ = 47492261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81046643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3096 + ... + 13102.

It is an arithmetic number, because the mean of its divisors is an integer number (6305040).

Almost surely, 2^81046693 is an apocalyptic number.

It is an amenable number.

81046693 is a deficient number, since it is larger than the sum of its proper divisors (19833947).

81046693 is a wasteful number, since it uses less digits than its factorization.

81046693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10116.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 81046693 is about 9002.5936818230. The cubic root of 81046693 is about 432.7579945777.

The spelling of 81046693 in words is "eighty-one million, forty-six thousand, six hundred ninety-three".