68760521 has 2 divisors, whose sum is σ = 68760522. Its totient is φ = 68760520.

The previous prime is 68760473. The next prime is 68760533. The reversal of 68760521 is 12506786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53860921 + 14899600 = 7339^2 + 3860^2 .

It is a cyclic number.

It is not a de Polignac number, because 68760521 - 2²² = 64566217 is a prime.

It is not a weakly prime, because it can be changed into another prime (68762521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34380260 + 34380261.

It is an arithmetic number, because the mean of its divisors is an integer number (34380261).

Almost surely, 2^68760521 is an apocalyptic number.

It is an amenable number.

68760521 is a deficient number, since it is larger than the sum of its proper divisors (1).

68760521 is an equidigital number, since it uses as much as digits as its factorization.

68760521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 68760521 is about 8292.1963917891. The cubic root of 68760521 is about 409.6815313959.

The spelling of 68760521 in words is "sixty-eight million, seven hundred sixty thousand, five hundred twenty-one".