68486857 has 2 divisors, whose sum is σ = 68486858. Its totient is φ = 68486856.

The previous prime is 68486839. The next prime is 68486861. The reversal of 68486857 is 75868486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63664441 + 4822416 = 7979^2 + 2196^2 .

It is a cyclic number.

It is not a de Polignac number, because 68486857 - 2⁷ = 68486729 is a prime.

It is not a weakly prime, because it can be changed into another prime (68486827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34243428 + 34243429.

It is an arithmetic number, because the mean of its divisors is an integer number (34243429).

Almost surely, 2^68486857 is an apocalyptic number.

It is an amenable number.

68486857 is a deficient number, since it is larger than the sum of its proper divisors (1).

68486857 is an equidigital number, since it uses as much as digits as its factorization.

68486857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2580480, while the sum is 52.

The square root of 68486857 is about 8275.6786428667. The cubic root of 68486857 is about 409.1373036301.

The spelling of 68486857 in words is "sixty-eight million, four hundred eighty-six thousand, eight hundred fifty-seven".