621300257 has 2 divisors, whose sum is σ = 621300258. Its totient is φ = 621300256.

The previous prime is 621300227. The next prime is 621300269. The reversal of 621300257 is 752003126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485717521 + 135582736 = 22039^2 + 11644^2 .

It is a cyclic number.

It is not a de Polignac number, because 621300257 - 2¹⁶ = 621234721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (621300227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310650128 + 310650129.

It is an arithmetic number, because the mean of its divisors is an integer number (310650129).

Almost surely, 2^621300257 is an apocalyptic number.

It is an amenable number.

621300257 is a deficient number, since it is larger than the sum of its proper divisors (1).

621300257 is an equidigital number, since it uses as much as digits as its factorization.

621300257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 621300257 is about 24925.8953098981. The cubic root of 621300257 is about 853.2975743716.

The spelling of 621300257 in words is "six hundred twenty-one million, three hundred thousand, two hundred fifty-seven".