9640259 has 2 divisors, whose sum is σ = 9640260. Its totient is φ = 9640258.

The previous prime is 9640247. The next prime is 9640297. The reversal of 9640259 is 9520469.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9640259 - 2¹² = 9636163 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9640219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820129 + 4820130.

It is an arithmetic number, because the mean of its divisors is an integer number (4820130).

Almost surely, 2^9640259 is an apocalyptic number.

9640259 is a deficient number, since it is larger than the sum of its proper divisors (1).

9640259 is an equidigital number, since it uses as much as digits as its factorization.

9640259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 9640259 is about 3104.8766481134. The cubic root of 9640259 is about 212.8283937441.

The spelling of 9640259 in words is "nine million, six hundred forty thousand, two hundred fifty-nine".