23911983 has 16 divisors (see below), whose sum is σ = 35500800. Its totient is φ = 15907320.

The previous prime is 23911981. The next prime is 23911991. The reversal of 23911983 is 38911932.

It is not a de Polignac number, because 23911983 - 2¹ = 23911981 is a prime.

It is a super-3 number, since 3×23911983³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23911981) 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, 22678 + ... + 23708.

It is an arithmetic number, because the mean of its divisors is an integer number (2218800).

Almost surely, 2^23911983 is an apocalyptic number.

23911983 is the 3093-rd heptagonal number.

23911983 is a deficient number, since it is larger than the sum of its proper divisors (11588817).

23911983 is a wasteful number, since it uses less digits than its factorization.

23911983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899 (or 1893 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 23911983 is about 4889.9880367952. The cubic root of 23911983 is about 288.0968641191.

The spelling of 23911983 in words is "twenty-three million, nine hundred eleven thousand, nine hundred eighty-three".