9913957 has 2 divisors, whose sum is σ = 9913958. Its totient is φ = 9913956.

The previous prime is 9913933. The next prime is 9913973. The reversal of 9913957 is 7593199.

9913957 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9897316 + 16641 = 3146^2 + 129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9913957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9913987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956978 + 4956979.

It is an arithmetic number, because the mean of its divisors is an integer number (4956979).

Almost surely, 2^9913957 is an apocalyptic number.

It is an amenable number.

9913957 is a deficient number, since it is larger than the sum of its proper divisors (1).

9913957 is an equidigital number, since it uses as much as digits as its factorization.

9913957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76545, while the sum is 43.

The square root of 9913957 is about 3148.6436762517. The cubic root of 9913957 is about 214.8237748318.

The spelling of 9913957 in words is "nine million, nine hundred thirteen thousand, nine hundred fifty-seven".