9897929 has 2 divisors, whose sum is σ = 9897930. Its totient is φ = 9897928.

The previous prime is 9897919. The next prime is 9897931. The reversal of 9897929 is 9297989.

9897929 is digitally balanced in base 2, because in such base 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., 8791225 + 1106704 = 2965^2 + 1052^2 .

It is a cyclic number.

It is not a de Polignac number, because 9897929 - 2⁴ = 9897913 is a prime.

It is a Sophie Germain prime.

Together with 9897931, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9897919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948964 + 4948965.

It is an arithmetic number, because the mean of its divisors is an integer number (4948965).

Almost surely, 2^9897929 is an apocalyptic number.

It is an amenable number.

9897929 is a deficient number, since it is larger than the sum of its proper divisors (1).

9897929 is an equidigital number, since it uses as much as digits as its factorization.

9897929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 53.

The square root of 9897929 is about 3146.0974237935. The cubic root of 9897929 is about 214.7079430914.

The spelling of 9897929 in words is "nine million, eight hundred ninety-seven thousand, nine hundred twenty-nine".