31994927 has 4 divisors (see below), whose sum is σ = 32519496. Its totient is φ = 31470360.

The previous prime is 31994891. The next prime is 31994929. The reversal of 31994927 is 72949913.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72949913 = 31 ⋅2353223.

It is a cyclic number.

It is not a de Polignac number, because 31994927 - 2¹² = 31990831 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 (31994929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262193 + ... + 262314.

It is an arithmetic number, because the mean of its divisors is an integer number (8129874).

Almost surely, 2^31994927 is an apocalyptic number.

31994927 is a deficient number, since it is larger than the sum of its proper divisors (524569).

31994927 is an equidigital number, since it uses as much as digits as its factorization.

31994927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524568.

The product of its digits is 122472, while the sum is 44.

The square root of 31994927 is about 5656.4058376322. The cubic root of 31994927 is about 317.4634326621.

The spelling of 31994927 in words is "thirty-one million, nine hundred ninety-four thousand, nine hundred twenty-seven".