80634857 has 2 divisors, whose sum is σ = 80634858. Its totient is φ = 80634856.

The previous prime is 80634817. The next prime is 80634871. The reversal of 80634857 is 75843608.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48497296 + 32137561 = 6964^2 + 5669^2 .

It is a cyclic number.

It is not a de Polignac number, because 80634857 - 2¹⁸ = 80372713 is a prime.

It is not a weakly prime, because it can be changed into another prime (80634817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40317428 + 40317429.

It is an arithmetic number, because the mean of its divisors is an integer number (40317429).

Almost surely, 2^80634857 is an apocalyptic number.

It is an amenable number.

80634857 is a deficient number, since it is larger than the sum of its proper divisors (1).

80634857 is an equidigital number, since it uses as much as digits as its factorization.

80634857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 80634857 is about 8979.6913644067. The cubic root of 80634857 is about 432.0237344784.

The spelling of 80634857 in words is "eighty million, six hundred thirty-four thousand, eight hundred fifty-seven".