80991313 has 8 divisors (see below), whose sum is σ = 90035456. Its totient is φ = 72349200.

The previous prime is 80991301. The next prime is 80991341. The reversal of 80991313 is 31319908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80991313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80991373) 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 7 ways as a sum of consecutive naturals, for example, 100083 + ... + 100888.

It is an arithmetic number, because the mean of its divisors is an integer number (11254432).

Almost surely, 2^80991313 is an apocalyptic number.

It is an amenable number.

80991313 is a deficient number, since it is larger than the sum of its proper divisors (9044143).

80991313 is a wasteful number, since it uses less digits than its factorization.

80991313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201015.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 80991313 is about 8999.5173759486. The cubic root of 80991313 is about 432.6594028577.

The spelling of 80991313 in words is "eighty million, nine hundred ninety-one thousand, three hundred thirteen".