68926621 has 2 divisors, whose sum is σ = 68926622. Its totient is φ = 68926620.

The previous prime is 68926601. The next prime is 68926633. The reversal of 68926621 is 12662986.

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., 61058596 + 7868025 = 7814^2 + 2805^2 .

It is a cyclic number.

It is not a de Polignac number, because 68926621 - 2⁷ = 68926493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68926601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34463310 + 34463311.

It is an arithmetic number, because the mean of its divisors is an integer number (34463311).

Almost surely, 2^68926621 is an apocalyptic number.

It is an amenable number.

68926621 is a deficient number, since it is larger than the sum of its proper divisors (1).

68926621 is an equidigital number, since it uses as much as digits as its factorization.

68926621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 68926621 is about 8302.2057912340. The cubic root of 68926621 is about 410.0111458402.

The spelling of 68926621 in words is "sixty-eight million, nine hundred twenty-six thousand, six hundred twenty-one".