80682257 has 2 divisors, whose sum is σ = 80682258. Its totient is φ = 80682256.

The previous prime is 80682253. The next prime is 80682293. The reversal of 80682257 is 75228608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52475536 + 28206721 = 7244^2 + 5311^2 .

It is a cyclic number.

It is not a de Polignac number, because 80682257 - 2² = 80682253 is a prime.

It is a super-2 number, since 2×80682257² = 13019253189228098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80682257.

It is not a weakly prime, because it can be changed into another prime (80682253) 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, 40341128 + 40341129.

It is an arithmetic number, because the mean of its divisors is an integer number (40341129).

Almost surely, 2^80682257 is an apocalyptic number.

It is an amenable number.

80682257 is a deficient number, since it is larger than the sum of its proper divisors (1).

80682257 is an equidigital number, since it uses as much as digits as its factorization.

80682257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 80682257 is about 8982.3302655825. The cubic root of 80682257 is about 432.1083708030.

The spelling of 80682257 in words is "eighty million, six hundred eighty-two thousand, two hundred fifty-seven".