621426097 has 2 divisors, whose sum is σ = 621426098. Its totient is φ = 621426096.

The previous prime is 621426077. The next prime is 621426101. The reversal of 621426097 is 790624126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514427761 + 106998336 = 22681^2 + 10344^2 .

It is a cyclic number.

It is not a de Polignac number, because 621426097 - 2¹⁵ = 621393329 is a prime.

It is not a weakly prime, because it can be changed into another prime (621426037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310713048 + 310713049.

It is an arithmetic number, because the mean of its divisors is an integer number (310713049).

Almost surely, 2^621426097 is an apocalyptic number.

It is an amenable number.

621426097 is a deficient number, since it is larger than the sum of its proper divisors (1).

621426097 is an equidigital number, since it uses as much as digits as its factorization.

621426097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 621426097 is about 24928.4194645389. The cubic root of 621426097 is about 853.3551802912.

The spelling of 621426097 in words is "six hundred twenty-one million, four hundred twenty-six thousand, ninety-seven".