23730409 has 4 divisors (see below), whose sum is σ = 23740416. Its totient is φ = 23720404.

The previous prime is 23730391. The next prime is 23730433. The reversal of 23730409 is 90403732.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23730409 - 2²³ = 15341801 is a prime.

It is a super-2 number, since 2×23730409² = 1126264622614562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23730709) 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, 792 + ... + 6934.

It is an arithmetic number, because the mean of its divisors is an integer number (5935104).

Almost surely, 2^23730409 is an apocalyptic number.

It is an amenable number.

23730409 is a deficient number, since it is larger than the sum of its proper divisors (10007).

23730409 is an equidigital number, since it uses as much as digits as its factorization.

23730409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 23730409 is about 4871.3867635407. The cubic root of 23730409 is about 287.3657959649.

The spelling of 23730409 in words is "twenty-three million, seven hundred thirty thousand, four hundred nine".