23047509 has 8 divisors (see below), whose sum is σ = 30757792. Its totient is φ = 15351120.

The previous prime is 23047501. The next prime is 23047511. The reversal of 23047509 is 90574032.

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

It is not a de Polignac number, because 23047509 - 2³ = 23047501 is a prime.

It is a super-2 number, since 2×23047509² = 1062375342210162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23047501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1362 + ... + 6924.

It is an arithmetic number, because the mean of its divisors is an integer number (3844724).

Almost surely, 2^23047509 is an apocalyptic number.

It is an amenable number.

23047509 is a deficient number, since it is larger than the sum of its proper divisors (7710283).

23047509 is a wasteful number, since it uses less digits than its factorization.

23047509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6947.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 23047509 is about 4800.7821237794. The cubic root of 23047509 is about 284.5823738624.

The spelling of 23047509 in words is "twenty-three million, forty-seven thousand, five hundred nine".