80913197 has 2 divisors, whose sum is σ = 80913198. Its totient is φ = 80913196.

The previous prime is 80913187. The next prime is 80913223. The reversal of 80913197 is 79131908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65593801 + 15319396 = 8099^2 + 3914^2 .

It is a cyclic number.

It is not a de Polignac number, because 80913197 - 2⁸ = 80912941 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80913197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80913137) 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 as a sum of consecutive naturals, namely, 40456598 + 40456599.

It is an arithmetic number, because the mean of its divisors is an integer number (40456599).

Almost surely, 2^80913197 is an apocalyptic number.

It is an amenable number.

80913197 is a deficient number, since it is larger than the sum of its proper divisors (1).

80913197 is an equidigital number, since it uses as much as digits as its factorization.

80913197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 80913197 is about 8995.1763184498. The cubic root of 80913197 is about 432.5202583314.

The spelling of 80913197 in words is "eighty million, nine hundred thirteen thousand, one hundred ninety-seven".