23689709 has 2 divisors, whose sum is σ = 23689710. Its totient is φ = 23689708.

The previous prime is 23689703. The next prime is 23689763. The reversal of 23689709 is 90798632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 10220809 = 3670^2 + 3197^2 .

It is a cyclic number.

It is not a de Polignac number, because 23689709 - 2⁸ = 23689453 is a prime.

It is a super-2 number, since 2×23689709² = 1122404625009362, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23689709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23689703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11844854 + 11844855.

It is an arithmetic number, because the mean of its divisors is an integer number (11844855).

Almost surely, 2^23689709 is an apocalyptic number.

It is an amenable number.

23689709 is a deficient number, since it is larger than the sum of its proper divisors (1).

23689709 is an equidigital number, since it uses as much as digits as its factorization.

23689709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 23689709 is about 4867.2075156089. The cubic root of 23689709 is about 287.2014150258.

The spelling of 23689709 in words is "twenty-three million, six hundred eighty-nine thousand, seven hundred nine".