31279412 has 6 divisors (see below), whose sum is σ = 54738978. Its totient is φ = 15639704.

The previous prime is 31279411. The next prime is 31279427. The reversal of 31279412 is 21497213.

It can be written as a sum of positive squares in only one way, i.e., 20016676 + 11262736 = 4474^2 + 3356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31279411) 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, 3909923 + ... + 3909930.

It is an arithmetic number, because the mean of its divisors is an integer number (9123163).

Almost surely, 2^31279412 is an apocalyptic number.

It is an amenable number.

31279412 is a deficient number, since it is larger than the sum of its proper divisors (23459566).

31279412 is a wasteful number, since it uses less digits than its factorization.

31279412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7819857 (or 7819855 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 31279412 is about 5592.8000143041. The cubic root of 31279412 is about 315.0790496157.

The spelling of 31279412 in words is "thirty-one million, two hundred seventy-nine thousand, four hundred twelve".