23547661 has 2 divisors, whose sum is σ = 23547662. Its totient is φ = 23547660.

The previous prime is 23547613. The next prime is 23547673. The reversal of 23547661 is 16674532.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23222761 + 324900 = 4819^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 23547661 - 2²¹ = 21450509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23547761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11773830 + 11773831.

It is an arithmetic number, because the mean of its divisors is an integer number (11773831).

Almost surely, 2^23547661 is an apocalyptic number.

It is an amenable number.

23547661 is a deficient number, since it is larger than the sum of its proper divisors (1).

23547661 is an equidigital number, since it uses as much as digits as its factorization.

23547661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 23547661 is about 4852.5932242462. The cubic root of 23547661 is about 286.6262257416.

The spelling of 23547661 in words is "twenty-three million, five hundred forty-seven thousand, six hundred sixty-one".