80762861 has 2 divisors, whose sum is σ = 80762862. Its totient is φ = 80762860.

The previous prime is 80762849. The next prime is 80762921. The reversal of 80762861 is 16826708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43626025 + 37136836 = 6605^2 + 6094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80762861 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80762761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40381430 + 40381431.

It is an arithmetic number, because the mean of its divisors is an integer number (40381431).

Almost surely, 2^80762861 is an apocalyptic number.

It is an amenable number.

80762861 is a deficient number, since it is larger than the sum of its proper divisors (1).

80762861 is an equidigital number, since it uses as much as digits as its factorization.

80762861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 80762861 is about 8986.8159544969. The cubic root of 80762861 is about 432.2522193277.

The spelling of 80762861 in words is "eighty million, seven hundred sixty-two thousand, eight hundred sixty-one".