9640919 has 2 divisors, whose sum is σ = 9640920. Its totient is φ = 9640918.

The previous prime is 9640913. The next prime is 9640957. The reversal of 9640919 is 9190469.

It is an a-pointer prime, because the next prime (9640957) can be obtained adding 9640919 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9640919 - 2⁸ = 9640663 is a prime.

It is a super-2 number, since 2×9640919² = 185894638329122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9640913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820459 + 4820460.

It is an arithmetic number, because the mean of its divisors is an integer number (4820460).

Almost surely, 2^9640919 is an apocalyptic number.

9640919 is a deficient number, since it is larger than the sum of its proper divisors (1).

9640919 is an equidigital number, since it uses as much as digits as its factorization.

9640919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 9640919 is about 3104.9829307099. The cubic root of 9640919 is about 212.8332505823.

The spelling of 9640919 in words is "nine million, six hundred forty thousand, nine hundred nineteen".