9121909697 has 4 divisors (see below), whose sum is σ = 9122107056. Its totient is φ = 9121712340.

The previous prime is 9121909651. The next prime is 9121909703. The reversal of 9121909697 is 7969091219.

9121909697 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9121909697 - 2²² = 9117715393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9121909607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12122 + ... + 135612.

It is an arithmetic number, because the mean of its divisors is an integer number (2280526764).

Almost surely, 2^9121909697 is an apocalyptic number.

It is an amenable number.

9121909697 is a deficient number, since it is larger than the sum of its proper divisors (197359).

9121909697 is a wasteful number, since it uses less digits than its factorization.

9121909697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197358.

The product of its (nonzero) digits is 551124, while the sum is 53.

The square root of 9121909697 is about 95508.6891177970. The cubic root of 9121909697 is about 2089.4336733920.

The spelling of 9121909697 in words is "nine billion, one hundred twenty-one million, nine hundred nine thousand, six hundred ninety-seven".