80860261 has 2 divisors, whose sum is σ = 80860262. Its totient is φ = 80860260.

The previous prime is 80860243. The next prime is 80860301. The reversal of 80860261 is 16206808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78872161 + 1988100 = 8881^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 80860261 - 2²³ = 72471653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80860061) 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, 40430130 + 40430131.

It is an arithmetic number, because the mean of its divisors is an integer number (40430131).

Almost surely, 2^80860261 is an apocalyptic number.

It is an amenable number.

80860261 is a deficient number, since it is larger than the sum of its proper divisors (1).

80860261 is an equidigital number, since it uses as much as digits as its factorization.

80860261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 80860261 is about 8992.2333710820. The cubic root of 80860261 is about 432.4259148945.

The spelling of 80860261 in words is "eighty million, eight hundred sixty thousand, two hundred sixty-one".