23399641 has 2 divisors, whose sum is σ = 23399642. Its totient is φ = 23399640.

The previous prime is 23399617. The next prime is 23399647. The reversal of 23399641 is 14699332.

23399641 = 3420² + 3421².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11703241 + 11696400 = 3421^2 + 3420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23399641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23399641.

It is not a weakly prime, because it can be changed into another prime (23399647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11699820 + 11699821.

It is an arithmetic number, because the mean of its divisors is an integer number (11699821).

Almost surely, 2^23399641 is an apocalyptic number.

23399641 is the 3421-st centered square number.

It is an amenable number.

23399641 is a deficient number, since it is larger than the sum of its proper divisors (1).

23399641 is an equidigital number, since it uses as much as digits as its factorization.

23399641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 37.

The square root of 23399641 is about 4837.3175417787. The cubic root of 23399641 is about 286.0243878661.

The spelling of 23399641 in words is "twenty-three million, three hundred ninety-nine thousand, six hundred forty-one".