68624761 has 2 divisors, whose sum is σ = 68624762. Its totient is φ = 68624760.

The previous prime is 68624741. The next prime is 68624779. The reversal of 68624761 is 16742686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63696361 + 4928400 = 7981^2 + 2220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68624761 is a prime.

It is not a weakly prime, because it can be changed into another prime (68624741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34312380 + 34312381.

It is an arithmetic number, because the mean of its divisors is an integer number (34312381).

Almost surely, 2^68624761 is an apocalyptic number.

It is an amenable number.

68624761 is a deficient number, since it is larger than the sum of its proper divisors (1).

68624761 is an equidigital number, since it uses as much as digits as its factorization.

68624761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 68624761 is about 8284.0063375157. The cubic root of 68624761 is about 409.4117302164.

The spelling of 68624761 in words is "sixty-eight million, six hundred twenty-four thousand, seven hundred sixty-one".