23479945 has 4 divisors (see below), whose sum is σ = 28175940. Its totient is φ = 18783952.

The previous prime is 23479943. The next prime is 23479957. The reversal of 23479945 is 54997432.

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 18696976 + 4782969 = 4324^2 + 2187^2 .

It is a cyclic number.

It is not a de Polignac number, because 23479945 - 2¹ = 23479943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23479943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2347990 + ... + 2347999.

It is an arithmetic number, because the mean of its divisors is an integer number (7043985).

Almost surely, 2^23479945 is an apocalyptic number.

It is an amenable number.

23479945 is a deficient number, since it is larger than the sum of its proper divisors (4695995).

23479945 is an equidigital number, since it uses as much as digits as its factorization.

23479945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4695994.

The product of its digits is 272160, while the sum is 43.

The square root of 23479945 is about 4845.6109005986. The cubic root of 23479945 is about 286.3512116432.

The spelling of 23479945 in words is "twenty-three million, four hundred seventy-nine thousand, nine hundred forty-five".