23905993 has 16 divisors (see below), whose sum is σ = 25909632. Its totient is φ = 22000000.

The previous prime is 23905969. The next prime is 23906017. The reversal of 23905993 is 39950932.

It is an interprime number because it is at equal distance from previous prime (23905969) and next prime (23906017).

It is a cyclic number.

It is not a de Polignac number, because 23905993 - 2¹⁷ = 23774921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23903993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95118 + ... + 95368.

It is an arithmetic number, because the mean of its divisors is an integer number (1619352).

Almost surely, 2^23905993 is an apocalyptic number.

23905993 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23905993 is a deficient number, since it is larger than the sum of its proper divisors (2003639).

23905993 is a wasteful number, since it uses less digits than its factorization.

23905993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416.

The product of its (nonzero) digits is 65610, while the sum is 40.

The square root of 23905993 is about 4889.3755224977. The cubic root of 23905993 is about 288.0728058281.

The spelling of 23905993 in words is "twenty-three million, nine hundred five thousand, nine hundred ninety-three".