23353661 has 2 divisors, whose sum is σ = 23353662. Its totient is φ = 23353660.

The previous prime is 23353657. The next prime is 23353663. The reversal of 23353661 is 16635332.

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., 19624900 + 3728761 = 4430^2 + 1931^2 .

It is a cyclic number.

It is not a de Polignac number, because 23353661 - 2² = 23353657 is a prime.

Together with 23353663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23353663) 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 as a sum of consecutive naturals, namely, 11676830 + 11676831.

It is an arithmetic number, because the mean of its divisors is an integer number (11676831).

Almost surely, 2^23353661 is an apocalyptic number.

It is an amenable number.

23353661 is a deficient number, since it is larger than the sum of its proper divisors (1).

23353661 is an equidigital number, since it uses as much as digits as its factorization.

23353661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 29.

The square root of 23353661 is about 4832.5625707279. The cubic root of 23353661 is about 285.8369202480.

Adding to 23353661 its reverse (16635332), we get a palindrome (39988993).

The spelling of 23353661 in words is "twenty-three million, three hundred fifty-three thousand, six hundred sixty-one".