621230693 has 2 divisors, whose sum is σ = 621230694. Its totient is φ = 621230692.

The previous prime is 621230639. The next prime is 621230737. The reversal of 621230693 is 396032126.

Together with previous prime (621230639) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 621106084 + 124609 = 24922^2 + 353^2 .

It is a cyclic number.

It is not a de Polignac number, because 621230693 - 2¹⁰ = 621229669 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 (621230993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310615346 + 310615347.

It is an arithmetic number, because the mean of its divisors is an integer number (310615347).

Almost surely, 2^621230693 is an apocalyptic number.

It is an amenable number.

621230693 is a deficient number, since it is larger than the sum of its proper divisors (1).

621230693 is an equidigital number, since it uses as much as digits as its factorization.

621230693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 621230693 is about 24924.4998545608. The cubic root of 621230693 is about 853.2657266419.

The spelling of 621230693 in words is "six hundred twenty-one million, two hundred thirty thousand, six hundred ninety-three".