623166223 has 2 divisors, whose sum is σ = 623166224. Its totient is φ = 623166222.

The previous prime is 623166157. The next prime is 623166253. The reversal of 623166223 is 322661326.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623166223 is a prime.

It is a super-2 number, since 2×623166223² = 776672282976171458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623166253) 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, 311583111 + 311583112.

It is an arithmetic number, because the mean of its divisors is an integer number (311583112).

Almost surely, 2^623166223 is an apocalyptic number.

623166223 is a deficient number, since it is larger than the sum of its proper divisors (1).

623166223 is an equidigital number, since it uses as much as digits as its factorization.

623166223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 31.

The square root of 623166223 is about 24963.2975185571. The cubic root of 623166223 is about 854.1509636465.

The spelling of 623166223 in words is "six hundred twenty-three million, one hundred sixty-six thousand, two hundred twenty-three".