23172149 has 24 divisors (see below), whose sum is σ = 31677408. Its totient is φ = 16662240.

The previous prime is 23172137. The next prime is 23172161. The reversal of 23172149 is 94127132.

It is an interprime number because it is at equal distance from previous prime (23172137) and next prime (23172161).

It is not a de Polignac number, because 23172149 - 2⁴ = 23172133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23172179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5354 + ... + 8660.

It is an arithmetic number, because the mean of its divisors is an integer number (1319892).

Almost surely, 2^23172149 is an apocalyptic number.

It is an amenable number.

23172149 is a deficient number, since it is larger than the sum of its proper divisors (8505259).

23172149 is a wasteful number, since it uses less digits than its factorization.

23172149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345 (or 3338 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 23172149 is about 4813.7458387414. The cubic root of 23172149 is about 285.0944552007.

The spelling of 23172149 in words is "twenty-three million, one hundred seventy-two thousand, one hundred forty-nine".