31960661 has 4 divisors (see below), whose sum is σ = 31987500. Its totient is φ = 31933824.

The previous prime is 31960631. The next prime is 31960667. The reversal of 31960661 is 16606913.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21911761 + 10048900 = 4681^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 31960661 - 2²² = 27766357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31960667) 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, 11546 + ... + 14043.

It is an arithmetic number, because the mean of its divisors is an integer number (7996875).

Almost surely, 2^31960661 is an apocalyptic number.

It is an amenable number.

31960661 is a deficient number, since it is larger than the sum of its proper divisors (26839).

31960661 is a wasteful number, since it uses less digits than its factorization.

31960661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26838.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 31960661 is about 5653.3760709863. The cubic root of 31960661 is about 317.3500596082.

The spelling of 31960661 in words is "thirty-one million, nine hundred sixty thousand, six hundred sixty-one".