31894066 has 4 divisors (see below), whose sum is σ = 47841102. Its totient is φ = 15947032.

The previous prime is 31894061. The next prime is 31894067. The reversal of 31894066 is 66049813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66049813 = 23 ⋅2871731.

It can be written as a sum of positive squares in only one way, i.e., 30747025 + 1147041 = 5545^2 + 1071^2 .

It is not an unprimeable number, because it can be changed into a prime (31894061) 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 as a sum of consecutive naturals, namely, 7973515 + ... + 7973518.

Almost surely, 2^31894066 is an apocalyptic number.

31894066 is a deficient number, since it is larger than the sum of its proper divisors (15947036).

31894066 is a wasteful number, since it uses less digits than its factorization.

31894066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15947035.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 31894066 is about 5647.4831562387. The cubic root of 31894066 is about 317.1294902981.

The spelling of 31894066 in words is "thirty-one million, eight hundred ninety-four thousand, sixty-six".