23947563 has 16 divisors (see below), whose sum is σ = 32783616. Its totient is φ = 15543840.

The previous prime is 23947559. The next prime is 23947571. The reversal of 23947563 is 36574932.

It is not a de Polignac number, because 23947563 - 2² = 23947559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23947513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18970 + ... + 20192.

It is an arithmetic number, because the mean of its divisors is an integer number (2048976).

Almost surely, 2^23947563 is an apocalyptic number.

23947563 is a deficient number, since it is larger than the sum of its proper divisors (8836053).

23947563 is a wasteful number, since it uses less digits than its factorization.

23947563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394.

The product of its digits is 136080, while the sum is 39.

The square root of 23947563 is about 4893.6247301974. The cubic root of 23947563 is about 288.2396852105.

The spelling of 23947563 in words is "twenty-three million, nine hundred forty-seven thousand, five hundred sixty-three".