68556479 has 2 divisors, whose sum is σ = 68556480. Its totient is φ = 68556478.

The previous prime is 68556431. The next prime is 68556487. The reversal of 68556479 is 97465586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68556479 - 2²⁰ = 67507903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68556419) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34278239 + 34278240.

It is an arithmetic number, because the mean of its divisors is an integer number (34278240).

Almost surely, 2^68556479 is an apocalyptic number.

68556479 is a deficient number, since it is larger than the sum of its proper divisors (1).

68556479 is an equidigital number, since it uses as much as digits as its factorization.

68556479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 50.

The square root of 68556479 is about 8279.8839967719. The cubic root of 68556479 is about 409.2758962092.

The spelling of 68556479 in words is "sixty-eight million, five hundred fifty-six thousand, four hundred seventy-nine".