23461721 has 2 divisors, whose sum is σ = 23461722. Its totient is φ = 23461720.

The previous prime is 23461687. The next prime is 23461729. The reversal of 23461721 is 12716432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 11316496 = 3485^2 + 3364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23461721 is a prime.

It is not a weakly prime, because it can be changed into another prime (23461729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11730860 + 11730861.

It is an arithmetic number, because the mean of its divisors is an integer number (11730861).

Almost surely, 2^23461721 is an apocalyptic number.

It is an amenable number.

23461721 is a deficient number, since it is larger than the sum of its proper divisors (1).

23461721 is an equidigital number, since it uses as much as digits as its factorization.

23461721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

The square root of 23461721 is about 4843.7300709267. The cubic root of 23461721 is about 286.2771084718.

The spelling of 23461721 in words is "twenty-three million, four hundred sixty-one thousand, seven hundred twenty-one".