23207129 has 4 divisors (see below), whose sum is σ = 25316880. Its totient is φ = 21097380.

The previous prime is 23207117. The next prime is 23207141. The reversal of 23207129 is 92170232.

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 an interprime number because it is at equal distance from previous prime (23207117) and next prime (23207141).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23207129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23207098 and 23207107.

It is not an unprimeable number, because it can be changed into a prime (23207629) 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, 1054859 + ... + 1054880.

It is an arithmetic number, because the mean of its divisors is an integer number (6329220).

Almost surely, 2^23207129 is an apocalyptic number.

It is an amenable number.

23207129 is a deficient number, since it is larger than the sum of its proper divisors (2109751).

23207129 is a wasteful number, since it uses less digits than its factorization.

23207129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109750.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 23207129 is about 4817.3778137074. The cubic root of 23207129 is about 285.2378398321.

It can be divided in two parts, 2320 and 7129, that added together give a palindrome (9449).

The spelling of 23207129 in words is "twenty-three million, two hundred seven thousand, one hundred twenty-nine".