621122869 has 2 divisors, whose sum is σ = 621122870. Its totient is φ = 621122868.

The previous prime is 621122833. The next prime is 621122881. The reversal of 621122869 is 968221126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363359844 + 257763025 = 19062^2 + 16055^2 .

It is a cyclic number.

It is not a de Polignac number, because 621122869 - 2¹³ = 621114677 is a prime.

It is a super-2 number, since 2×621122869² = 771587236789582322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621122809) 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, 310561434 + 310561435.

It is an arithmetic number, because the mean of its divisors is an integer number (310561435).

Almost surely, 2^621122869 is an apocalyptic number.

It is an amenable number.

621122869 is a deficient number, since it is larger than the sum of its proper divisors (1).

621122869 is an equidigital number, since it uses as much as digits as its factorization.

621122869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 621122869 is about 24922.3367483870. The cubic root of 621122869 is about 853.2163580536.

The spelling of 621122869 in words is "six hundred twenty-one million, one hundred twenty-two thousand, eight hundred sixty-nine".