68879761 has 2 divisors, whose sum is σ = 68879762. Its totient is φ = 68879760.

The previous prime is 68879753. The next prime is 68879771. The reversal of 68879761 is 16797886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59969536 + 8910225 = 7744^2 + 2985^2 .

It is a cyclic number.

It is not a de Polignac number, because 68879761 - 2³ = 68879753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68879699 and 68879708.

It is not a weakly prime, because it can be changed into another prime (68879771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34439880 + 34439881.

It is an arithmetic number, because the mean of its divisors is an integer number (34439881).

Almost surely, 2^68879761 is an apocalyptic number.

It is an amenable number.

68879761 is a deficient number, since it is larger than the sum of its proper divisors (1).

68879761 is an equidigital number, since it uses as much as digits as its factorization.

68879761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 52.

The square root of 68879761 is about 8299.3831698506. The cubic root of 68879761 is about 409.9182089473.

The spelling of 68879761 in words is "sixty-eight million, eight hundred seventy-nine thousand, seven hundred sixty-one".