68926021 has 2 divisors, whose sum is σ = 68926022. Its totient is φ = 68926020.

The previous prime is 68926003. The next prime is 68926027. The reversal of 68926021 is 12062986.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34644996 + 34281025 = 5886^2 + 5855^2 .

It is a cyclic number.

It is not a de Polignac number, because 68926021 - 2¹⁷ = 68794949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68926027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34463010 + 34463011.

It is an arithmetic number, because the mean of its divisors is an integer number (34463011).

Almost surely, 2^68926021 is an apocalyptic number.

It is an amenable number.

68926021 is a deficient number, since it is larger than the sum of its proper divisors (1).

68926021 is an equidigital number, since it uses as much as digits as its factorization.

68926021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 68926021 is about 8302.1696561802. The cubic root of 68926021 is about 410.0099561334.

The spelling of 68926021 in words is "sixty-eight million, nine hundred twenty-six thousand, twenty-one".