80611901 has 2 divisors, whose sum is σ = 80611902. Its totient is φ = 80611900.

The previous prime is 80611897. The next prime is 80611939. The reversal of 80611901 is 10911608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54612100 + 25999801 = 7390^2 + 5099^2 .

It is a cyclic number.

It is not a de Polignac number, because 80611901 - 2² = 80611897 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80611961) 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, 40305950 + 40305951.

It is an arithmetic number, because the mean of its divisors is an integer number (40305951).

Almost surely, 2^80611901 is an apocalyptic number.

It is an amenable number.

80611901 is a deficient number, since it is larger than the sum of its proper divisors (1).

80611901 is an equidigital number, since it uses as much as digits as its factorization.

80611901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 80611901 is about 8978.4130557688. The cubic root of 80611901 is about 431.9827328632.

The spelling of 80611901 in words is "eighty million, six hundred eleven thousand, nine hundred one".