80839657 has 2 divisors, whose sum is σ = 80839658. Its totient is φ = 80839656.

The previous prime is 80839643. The next prime is 80839667. The reversal of 80839657 is 75693808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63107136 + 17732521 = 7944^2 + 4211^2 .

It is a cyclic number.

It is not a de Polignac number, because 80839657 - 2¹⁹ = 80315369 is a prime.

It is not a weakly prime, because it can be changed into another prime (80839667) 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, 40419828 + 40419829.

It is an arithmetic number, because the mean of its divisors is an integer number (40419829).

Almost surely, 2^80839657 is an apocalyptic number.

It is an amenable number.

80839657 is a deficient number, since it is larger than the sum of its proper divisors (1).

80839657 is an equidigital number, since it uses as much as digits as its factorization.

80839657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 80839657 is about 8991.0876427716. The cubic root of 80839657 is about 432.3891829642.

The spelling of 80839657 in words is "eighty million, eight hundred thirty-nine thousand, six hundred fifty-seven".