621252293 has 2 divisors, whose sum is σ = 621252294. Its totient is φ = 621252292.

The previous prime is 621252277. The next prime is 621252323. The reversal of 621252293 is 392252126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 580713604 + 40538689 = 24098^2 + 6367^2 .

It is a cyclic number.

It is not a de Polignac number, because 621252293 - 2⁴ = 621252277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621252223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310626146 + 310626147.

It is an arithmetic number, because the mean of its divisors is an integer number (310626147).

Almost surely, 2^621252293 is an apocalyptic number.

It is an amenable number.

621252293 is a deficient number, since it is larger than the sum of its proper divisors (1).

621252293 is an equidigital number, since it uses as much as digits as its factorization.

621252293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 621252293 is about 24924.9331593888. The cubic root of 621252293 is about 853.2756157895.

The spelling of 621252293 in words is "six hundred twenty-one million, two hundred fifty-two thousand, two hundred ninety-three".