23172903 has 24 divisors (see below), whose sum is σ = 37215360. Its totient is φ = 13798080.

The previous prime is 23172881. The next prime is 23172911. The reversal of 23172903 is 30927132.

It is not a de Polignac number, because 23172903 - 2⁶ = 23172839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23172923) 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 23 ways as a sum of consecutive naturals, for example, 433 + ... + 6821.

It is an arithmetic number, because the mean of its divisors is an integer number (1550640).

Almost surely, 2^23172903 is an apocalyptic number.

23172903 is a deficient number, since it is larger than the sum of its proper divisors (14042457).

23172903 is a wasteful number, since it uses less digits than its factorization.

23172903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6439 (or 6436 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 23172903 is about 4813.8241554922. The cubic root of 23172903 is about 285.0975474026.

The spelling of 23172903 in words is "twenty-three million, one hundred seventy-two thousand, nine hundred three".