623646269 has 2 divisors, whose sum is σ = 623646270. Its totient is φ = 623646268.

The previous prime is 623646197. The next prime is 623646293. The reversal of 623646269 is 962646326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 574225369 + 49420900 = 23963^2 + 7030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623646269 is a prime.

It is a super-2 number, since 2×623646269² = 777869337675240722, 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 (623642269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311823134 + 311823135.

It is an arithmetic number, because the mean of its divisors is an integer number (311823135).

Almost surely, 2^623646269 is an apocalyptic number.

It is an amenable number.

623646269 is a deficient number, since it is larger than the sum of its proper divisors (1).

623646269 is an equidigital number, since it uses as much as digits as its factorization.

623646269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 44.

The square root of 623646269 is about 24972.9107034002. The cubic root of 623646269 is about 854.3702344694.

The spelling of 623646269 in words is "six hundred twenty-three million, six hundred forty-six thousand, two hundred sixty-nine".