31670923 has 4 divisors (see below), whose sum is σ = 31765240. Its totient is φ = 31576608.

The previous prime is 31670921. The next prime is 31670939. The reversal of 31670923 is 32907613.

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 31670923 - 2¹ = 31670921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31670921) 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, 46653 + ... + 47326.

It is an arithmetic number, because the mean of its divisors is an integer number (7941310).

Almost surely, 2^31670923 is an apocalyptic number.

31670923 is a deficient number, since it is larger than the sum of its proper divisors (94317).

31670923 is an equidigital number, since it uses as much as digits as its factorization.

31670923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94316.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 31670923 is about 5627.6925111452. The cubic root of 31670923 is about 316.3881726312.

The spelling of 31670923 in words is "thirty-one million, six hundred seventy thousand, nine hundred twenty-three".