31673387 has 4 divisors (see below), whose sum is σ = 31863216. Its totient is φ = 31483560.

The previous prime is 31673357. The next prime is 31673393. The reversal of 31673387 is 78337613.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78337613 = 29 ⋅2701297.

It is a cyclic number.

It is not a de Polignac number, because 31673387 - 2¹² = 31669291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31673387.

It is not an unprimeable number, because it can be changed into a prime (31673357) 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, 94664 + ... + 94997.

It is an arithmetic number, because the mean of its divisors is an integer number (7965804).

Almost surely, 2^31673387 is an apocalyptic number.

31673387 is a deficient number, since it is larger than the sum of its proper divisors (189829).

31673387 is a wasteful number, since it uses less digits than its factorization.

31673387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189828.

The product of its digits is 63504, while the sum is 38.

The square root of 31673387 is about 5627.9114243207. The cubic root of 31673387 is about 316.3963774256.

The spelling of 31673387 in words is "thirty-one million, six hundred seventy-three thousand, three hundred eighty-seven".