623655269 has 2 divisors, whose sum is σ = 623655270. Its totient is φ = 623655268.

The previous prime is 623655199. The next prime is 623655271. The reversal of 623655269 is 962556326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 351075169 + 272580100 = 18737^2 + 16510^2 .

It is a cyclic number.

It is not a de Polignac number, because 623655269 - 2¹² = 623651173 is a prime.

It is a super-2 number, since 2×623655269² = 777891789102924722, which contains 22 as substring.

Together with 623655271, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_32493797 and since 623655269 and 32493797 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623655289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311827634 + 311827635.

It is an arithmetic number, because the mean of its divisors is an integer number (311827635).

Almost surely, 2^623655269 is an apocalyptic number.

It is an amenable number.

623655269 is a deficient number, since it is larger than the sum of its proper divisors (1).

623655269 is an equidigital number, since it uses as much as digits as its factorization.

623655269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 44.

The square root of 623655269 is about 24973.0908980046. The cubic root of 623655269 is about 854.3743443286.

The spelling of 623655269 in words is "six hundred twenty-three million, six hundred fifty-five thousand, two hundred sixty-nine".