23723639 has 2 divisors, whose sum is σ = 23723640. Its totient is φ = 23723638.

The previous prime is 23723627. The next prime is 23723683. The reversal of 23723639 is 93632732.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23723639 - 2²⁰ = 22675063 is a prime.

It is a super-2 number, since 2×23723639² = 1125622094804642, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23723599 and 23723608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23723699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11861819 + 11861820.

It is an arithmetic number, because the mean of its divisors is an integer number (11861820).

Almost surely, 2^23723639 is an apocalyptic number.

23723639 is a deficient number, since it is larger than the sum of its proper divisors (1).

23723639 is an equidigital number, since it uses as much as digits as its factorization.

23723639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 35.

The square root of 23723639 is about 4870.6918399751. The cubic root of 23723639 is about 287.3384660317.

The spelling of 23723639 in words is "twenty-three million, seven hundred twenty-three thousand, six hundred thirty-nine".