80994813 has 16 divisors (see below), whose sum is σ = 111234816. Its totient is φ = 52384320.

The previous prime is 80994773. The next prime is 80994839. The reversal of 80994813 is 31849908.

It is not a de Polignac number, because 80994813 - 2¹⁸ = 80732669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80994713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46995 + ... + 48687.

It is an arithmetic number, because the mean of its divisors is an integer number (6952176).

Almost surely, 2^80994813 is an apocalyptic number.

It is an amenable number.

80994813 is a deficient number, since it is larger than the sum of its proper divisors (30240003).

80994813 is a wasteful number, since it uses less digits than its factorization.

80994813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 80994813 is about 8999.7118287199. The cubic root of 80994813 is about 432.6656351562.

The spelling of 80994813 in words is "eighty million, nine hundred ninety-four thousand, eight hundred thirteen".