23702009 has 2 divisors, whose sum is σ = 23702010. Its totient is φ = 23702008.

The previous prime is 23701981. The next prime is 23702033. The reversal of 23702009 is 90020732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12996025 + 10705984 = 3605^2 + 3272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23702009 is a prime.

It is not a weakly prime, because it can be changed into another prime (23702039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11851004 + 11851005.

It is an arithmetic number, because the mean of its divisors is an integer number (11851005).

Almost surely, 2^23702009 is an apocalyptic number.

It is an amenable number.

23702009 is a deficient number, since it is larger than the sum of its proper divisors (1).

23702009 is an equidigital number, since it uses as much as digits as its factorization.

23702009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 23702009 is about 4868.4709098443. The cubic root of 23702009 is about 287.2511126419.

The spelling of 23702009 in words is "twenty-three million, seven hundred two thousand, nine".