68252021 has 2 divisors, whose sum is σ = 68252022. Its totient is φ = 68252020.

The previous prime is 68252011. The next prime is 68252039. The reversal of 68252021 is 12025286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52562500 + 15689521 = 7250^2 + 3961^2 .

It is a cyclic number.

It is not a de Polignac number, because 68252021 - 2¹⁰ = 68250997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68252011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34126010 + 34126011.

It is an arithmetic number, because the mean of its divisors is an integer number (34126011).

Almost surely, 2^68252021 is an apocalyptic number.

It is an amenable number.

68252021 is a deficient number, since it is larger than the sum of its proper divisors (1).

68252021 is an equidigital number, since it uses as much as digits as its factorization.

68252021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 68252021 is about 8261.4781365080. The cubic root of 68252021 is about 408.6691349974.

The spelling of 68252021 in words is "sixty-eight million, two hundred fifty-two thousand, twenty-one".