13623943 has 2 divisors, whose sum is σ = 13623944. Its totient is φ = 13623942.

The previous prime is 13623901. The next prime is 13623949. The reversal of 13623943 is 34932631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13623943 - 2⁹ = 13623431 is a prime.

It is a super-2 number, since 2×13623943² = 371223645734498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13623949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6811971 + 6811972.

It is an arithmetic number, because the mean of its divisors is an integer number (6811972).

Almost surely, 2^13623943 is an apocalyptic number.

13623943 is a deficient number, since it is larger than the sum of its proper divisors (1).

13623943 is an equidigital number, since it uses as much as digits as its factorization.

13623943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 31.

The square root of 13623943 is about 3691.0625841348. The cubic root of 13623943 is about 238.8366325777.

The spelling of 13623943 in words is "thirteen million, six hundred twenty-three thousand, nine hundred forty-three".