68961253 has 2 divisors, whose sum is σ = 68961254. Its totient is φ = 68961252.

The previous prime is 68961239. The next prime is 68961257. The reversal of 68961253 is 35216986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58476609 + 10484644 = 7647^2 + 3238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68961253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68961257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34480626 + 34480627.

It is an arithmetic number, because the mean of its divisors is an integer number (34480627).

Almost surely, 2^68961253 is an apocalyptic number.

It is an amenable number.

68961253 is a deficient number, since it is larger than the sum of its proper divisors (1).

68961253 is an equidigital number, since it uses as much as digits as its factorization.

68961253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 68961253 is about 8304.2912400758. The cubic root of 68961253 is about 410.0798040175.

The spelling of 68961253 in words is "sixty-eight million, nine hundred sixty-one thousand, two hundred fifty-three".