9661913 has 2 divisors, whose sum is σ = 9661914. Its totient is φ = 9661912.

The previous prime is 9661889. The next prime is 9661919. The reversal of 9661913 is 3191669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9653449 + 8464 = 3107^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 9661913 - 2⁶ = 9661849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9661919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830956 + 4830957.

It is an arithmetic number, because the mean of its divisors is an integer number (4830957).

Almost surely, 2^9661913 is an apocalyptic number.

It is an amenable number.

9661913 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661913 is an equidigital number, since it uses as much as digits as its factorization.

9661913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 35.

The square root of 9661913 is about 3108.3617871799. The cubic root of 9661913 is about 212.9876266626.

The spelling of 9661913 in words is "nine million, six hundred sixty-one thousand, nine hundred thirteen".