68581879 has 2 divisors, whose sum is σ = 68581880. Its totient is φ = 68581878.

The previous prime is 68581823. The next prime is 68581901. The reversal of 68581879 is 97818586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68581879 - 2⁹ = 68581367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68585879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34290939 + 34290940.

It is an arithmetic number, because the mean of its divisors is an integer number (34290940).

Almost surely, 2^68581879 is an apocalyptic number.

68581879 is a deficient number, since it is larger than the sum of its proper divisors (1).

68581879 is an equidigital number, since it uses as much as digits as its factorization.

68581879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 52.

The square root of 68581879 is about 8281.4176926418. The cubic root of 68581879 is about 409.3264351922.

The spelling of 68581879 in words is "sixty-eight million, five hundred eighty-one thousand, eight hundred seventy-nine".