23720647 has 2 divisors, whose sum is σ = 23720648. Its totient is φ = 23720646.

The previous prime is 23720639. The next prime is 23720657. The reversal of 23720647 is 74602732.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23720647 - 2³ = 23720639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23720617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11860323 + 11860324.

It is an arithmetic number, because the mean of its divisors is an integer number (11860324).

Almost surely, 2^23720647 is an apocalyptic number.

23720647 is a deficient number, since it is larger than the sum of its proper divisors (1).

23720647 is an equidigital number, since it uses as much as digits as its factorization.

23720647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 23720647 is about 4870.3846870653. The cubic root of 23720647 is about 287.3263859171.

The spelling of 23720647 in words is "twenty-three million, seven hundred twenty thousand, six hundred forty-seven".