23840657 has 2 divisors, whose sum is σ = 23840658. Its totient is φ = 23840656.

The previous prime is 23840651. The next prime is 23840669. The reversal of 23840657 is 75604832.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14409616 + 9431041 = 3796^2 + 3071^2 .

It is a cyclic number.

It is not a de Polignac number, because 23840657 - 2¹⁰ = 23839633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23840651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11920328 + 11920329.

It is an arithmetic number, because the mean of its divisors is an integer number (11920329).

Almost surely, 2^23840657 is an apocalyptic number.

It is an amenable number.

23840657 is a deficient number, since it is larger than the sum of its proper divisors (1).

23840657 is an equidigital number, since it uses as much as digits as its factorization.

23840657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 23840657 is about 4882.6895252514. The cubic root of 23840657 is about 287.8101283540.

The spelling of 23840657 in words is "twenty-three million, eight hundred forty thousand, six hundred fifty-seven".