621272569 has 2 divisors, whose sum is σ = 621272570. Its totient is φ = 621272568.

The previous prime is 621272567. The next prime is 621272591. The reversal of 621272569 is 965272126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 446054400 + 175218169 = 21120^2 + 13237^2 .

It is a cyclic number.

It is not a de Polignac number, because 621272569 - 2¹ = 621272567 is a prime.

It is a super-2 number, since 2×621272569² = 771959209983719522, which contains 22 as substring.

Together with 621272567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (621272567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310636284 + 310636285.

It is an arithmetic number, because the mean of its divisors is an integer number (310636285).

Almost surely, 2^621272569 is an apocalyptic number.

It is an amenable number.

621272569 is a deficient number, since it is larger than the sum of its proper divisors (1).

621272569 is an equidigital number, since it uses as much as digits as its factorization.

621272569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 621272569 is about 24925.3398973815. The cubic root of 621272569 is about 853.2848985605.

The spelling of 621272569 in words is "six hundred twenty-one million, two hundred seventy-two thousand, five hundred sixty-nine".