80991683 has 2 divisors, whose sum is σ = 80991684. Its totient is φ = 80991682.

The previous prime is 80991679. The next prime is 80991697. The reversal of 80991683 is 38619908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80991683 - 2² = 80991679 is a prime.

It is not a weakly prime, because it can be changed into another prime (80991653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40495841 + 40495842.

It is an arithmetic number, because the mean of its divisors is an integer number (40495842).

Almost surely, 2^80991683 is an apocalyptic number.

80991683 is a deficient number, since it is larger than the sum of its proper divisors (1).

80991683 is an equidigital number, since it uses as much as digits as its factorization.

80991683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 80991683 is about 8999.5379325830. The cubic root of 80991683 is about 432.6600617092.

The spelling of 80991683 in words is "eighty million, nine hundred ninety-one thousand, six hundred eighty-three".