9631691 has 4 divisors (see below), whose sum is σ = 9795000. Its totient is φ = 9468384.

The previous prime is 9631681. The next prime is 9631697. The reversal of 9631691 is 1961369.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1961369 = 821 ⋅2389.

It is a cyclic number.

It is not a de Polignac number, because 9631691 - 2⁶ = 9631627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9631697) 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, 81566 + ... + 81683.

It is an arithmetic number, because the mean of its divisors is an integer number (2448750).

Almost surely, 2^9631691 is an apocalyptic number.

9631691 is a deficient number, since it is larger than the sum of its proper divisors (163309).

9631691 is a wasteful number, since it uses less digits than its factorization.

9631691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163308.

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

The square root of 9631691 is about 3103.4965764441. The cubic root of 9631691 is about 212.7653230260.

The spelling of 9631691 in words is "nine million, six hundred thirty-one thousand, six hundred ninety-one".