23447961 has 20 divisors (see below), whose sum is σ = 35299572. Its totient is φ = 15510528.

The previous prime is 23447953. The next prime is 23447987. The reversal of 23447961 is 16974432.

It can be written as a sum of positive squares in 2 ways, for example, as 4473225 + 18974736 = 2115^2 + 4356^2 .

It is not a de Polignac number, because 23447961 - 2³ = 23447953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23447461) 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 19 ways as a sum of consecutive naturals, for example, 10041 + ... + 12153.

Almost surely, 2^23447961 is an apocalyptic number.

It is an amenable number.

23447961 is a deficient number, since it is larger than the sum of its proper divisors (11851611).

23447961 is a wasteful number, since it uses less digits than its factorization.

23447961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262 (or 2253 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 23447961 is about 4842.3094696642. The cubic root of 23447961 is about 286.2211315700.

The spelling of 23447961 in words is "twenty-three million, four hundred forty-seven thousand, nine hundred sixty-one".