23447661 has 4 divisors (see below), whose sum is σ = 31263552. Its totient is φ = 15631772.

The previous prime is 23447657. The next prime is 23447663. The reversal of 23447661 is 16674432.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 23447661 - 2² = 23447657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23447663) 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 3 ways as a sum of consecutive naturals, for example, 3907941 + ... + 3907946.

It is an arithmetic number, because the mean of its divisors is an integer number (7815888).

Almost surely, 2^23447661 is an apocalyptic number.

It is an amenable number.

23447661 is a deficient number, since it is larger than the sum of its proper divisors (7815891).

23447661 is an equidigital number, since it uses as much as digits as its factorization.

23447661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7815890.

The product of its digits is 24192, while the sum is 33.

The square root of 23447661 is about 4842.2784926107. The cubic root of 23447661 is about 286.2199108995.

It can be divided in two parts, 234 and 47661, that added together give a triangular number (47895 = T₃₀₉).

The spelling of 23447661 in words is "twenty-three million, four hundred forty-seven thousand, six hundred sixty-one".