64028621 has 2 divisors, whose sum is σ = 64028622. Its totient is φ = 64028620.

The previous prime is 64028603. The next prime is 64028641. The reversal of 64028621 is 12682046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46430596 + 17598025 = 6814^2 + 4195^2 .

It is a cyclic number.

It is not a de Polignac number, because 64028621 - 2¹⁴ = 64012237 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64028641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32014310 + 32014311.

It is an arithmetic number, because the mean of its divisors is an integer number (32014311).

Almost surely, 2^64028621 is an apocalyptic number.

It is an amenable number.

64028621 is a deficient number, since it is larger than the sum of its proper divisors (1).

64028621 is an equidigital number, since it uses as much as digits as its factorization.

64028621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 64028621 is about 8001.7886125541. The cubic root of 64028621 is about 400.0596181971.

The spelling of 64028621 in words is "sixty-four million, twenty-eight thousand, six hundred twenty-one".