23979973 has 4 divisors (see below), whose sum is σ = 24035788. Its totient is φ = 23924160.

The previous prime is 23979953. The next prime is 23979997. The reversal of 23979973 is 37997932.

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 13527684 + 10452289 = 3678^2 + 3233^2 .

It is a cyclic number.

It is not a de Polignac number, because 23979973 - 2⁵ = 23979941 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 (23979953) 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, 27258 + ... + 28123.

It is an arithmetic number, because the mean of its divisors is an integer number (6008947).

Almost surely, 2^23979973 is an apocalyptic number.

It is an amenable number.

23979973 is a deficient number, since it is larger than the sum of its proper divisors (55815).

23979973 is an equidigital number, since it uses as much as digits as its factorization.

23979973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55814.

The product of its digits is 642978, while the sum is 49.

The square root of 23979973 is about 4896.9350618525. The cubic root of 23979973 is about 288.3696585892.

The spelling of 23979973 in words is "twenty-three million, nine hundred seventy-nine thousand, nine hundred seventy-three".