68132621 has 2 divisors, whose sum is σ = 68132622. Its totient is φ = 68132620.

The previous prime is 68132609. The next prime is 68132639. The reversal of 68132621 is 12623186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60918025 + 7214596 = 7805^2 + 2686^2 .

It is a cyclic number.

It is not a de Polignac number, because 68132621 - 2⁶ = 68132557 is a prime.

It is equal to p_4014686 and since 68132621 and 4014686 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68132641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34066310 + 34066311.

It is an arithmetic number, because the mean of its divisors is an integer number (34066311).

Almost surely, 2^68132621 is an apocalyptic number.

It is an amenable number.

68132621 is a deficient number, since it is larger than the sum of its proper divisors (1).

68132621 is an equidigital number, since it uses as much as digits as its factorization.

68132621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 68132621 is about 8254.2486635671. The cubic root of 68132621 is about 408.4306874725.

The spelling of 68132621 in words is "sixty-eight million, one hundred thirty-two thousand, six hundred twenty-one".