23403309 has 8 divisors (see below), whose sum is σ = 31930272. Its totient is φ = 15239280.

The previous prime is 23403293. The next prime is 23403313. The reversal of 23403309 is 90330432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23403309 - 2⁴ = 23403293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23403329) 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 7 ways as a sum of consecutive naturals, for example, 90582 + ... + 90839.

It is an arithmetic number, because the mean of its divisors is an integer number (3991284).

Almost surely, 2^23403309 is an apocalyptic number.

It is an amenable number.

23403309 is a deficient number, since it is larger than the sum of its proper divisors (8526963).

23403309 is a wasteful number, since it uses less digits than its factorization.

23403309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181467.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 23403309 is about 4837.6966626691. The cubic root of 23403309 is about 286.0393322925.

The spelling of 23403309 in words is "twenty-three million, four hundred three thousand, three hundred nine".