23729397 has 4 divisors (see below), whose sum is σ = 31639200. Its totient is φ = 15819596.

The previous prime is 23729369. The next prime is 23729411. The reversal of 23729397 is 79392732.

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 23729397 - 2⁶ = 23729333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23724397) 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 3 ways as a sum of consecutive naturals, for example, 3954897 + ... + 3954902.

It is an arithmetic number, because the mean of its divisors is an integer number (7909800).

Almost surely, 2^23729397 is an apocalyptic number.

It is an amenable number.

23729397 is a deficient number, since it is larger than the sum of its proper divisors (7909803).

23729397 is an equidigital number, since it uses as much as digits as its factorization.

23729397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7909802.

The product of its digits is 142884, while the sum is 42.

The square root of 23729397 is about 4871.2828905741. The cubic root of 23729397 is about 287.3617109346.

The spelling of 23729397 in words is "twenty-three million, seven hundred twenty-nine thousand, three hundred ninety-seven".