23729897 has 4 divisors (see below), whose sum is σ = 23745876. Its totient is φ = 23713920.

The previous prime is 23729873. The next prime is 23729903. The reversal of 23729897 is 79892732.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2835856 + 20894041 = 1684^2 + 4571^2 .

It is a cyclic number.

It is not a de Polignac number, because 23729897 - 2¹⁴ = 23713513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23729837) 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, 5504 + ... + 8817.

It is an arithmetic number, because the mean of its divisors is an integer number (5936469).

Almost surely, 2^23729897 is an apocalyptic number.

It is an amenable number.

23729897 is a deficient number, since it is larger than the sum of its proper divisors (15979).

23729897 is a wasteful number, since it uses less digits than its factorization.

23729897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15978.

The product of its digits is 381024, while the sum is 47.

The square root of 23729897 is about 4871.3342114866. The cubic root of 23729897 is about 287.3637292447.

The spelling of 23729897 in words is "twenty-three million, seven hundred twenty-nine thousand, eight hundred ninety-seven".