23129237 has 4 divisors (see below), whose sum is σ = 24134880. Its totient is φ = 22123596.

The previous prime is 23129209. The next prime is 23129243. The reversal of 23129237 is 73292132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23129237 - 2⁸ = 23128981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23129437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502787 + ... + 502832.

It is an arithmetic number, because the mean of its divisors is an integer number (6033720).

Almost surely, 2^23129237 is an apocalyptic number.

It is an amenable number.

23129237 is a deficient number, since it is larger than the sum of its proper divisors (1005643).

23129237 is a wasteful number, since it uses less digits than its factorization.

23129237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005642.

The product of its digits is 4536, while the sum is 29.

The square root of 23129237 is about 4809.2865375230. The cubic root of 23129237 is about 284.9183597080.

The spelling of 23129237 in words is "twenty-three million, one hundred twenty-nine thousand, two hundred thirty-seven".