9975691 has 4 divisors (see below), whose sum is σ = 10882584. Its totient is φ = 9068800.

The previous prime is 9975689. The next prime is 9975709. The reversal of 9975691 is 1965799.

9975691 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 9975691 - 2¹ = 9975689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9975631) 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, 453430 + ... + 453451.

It is an arithmetic number, because the mean of its divisors is an integer number (2720646).

Almost surely, 2^9975691 is an apocalyptic number.

9975691 is a deficient number, since it is larger than the sum of its proper divisors (906893).

9975691 is a wasteful number, since it uses less digits than its factorization.

9975691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906892.

The product of its digits is 153090, while the sum is 46.

The square root of 9975691 is about 3158.4317310969. The cubic root of 9975691 is about 215.2687535117.

The spelling of 9975691 in words is "nine million, nine hundred seventy-five thousand, six hundred ninety-one".