31873073 has 4 divisors (see below), whose sum is σ = 31887360. Its totient is φ = 31858788.

The previous prime is 31873033. The next prime is 31873081. The reversal of 31873073 is 37037813.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31873073 - 2¹⁶ = 31807537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31873033) 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, 2993 + ... + 8526.

It is an arithmetic number, because the mean of its divisors is an integer number (7971840).

Almost surely, 2^31873073 is an apocalyptic number.

It is an amenable number.

31873073 is a deficient number, since it is larger than the sum of its proper divisors (14287).

31873073 is a wasteful number, since it uses less digits than its factorization.

31873073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14286.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 31873073 is about 5645.6242347503. The cubic root of 31873073 is about 317.0598957368.

The spelling of 31873073 in words is "thirty-one million, eight hundred seventy-three thousand, seventy-three".