31430673 has 20 divisors (see below), whose sum is σ = 48996288. Its totient is φ = 20041560.

The previous prime is 31430669. The next prime is 31430681. The reversal of 31430673 is 37603413.

It is a happy number.

It is not a de Polignac number, because 31430673 - 2² = 31430669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31430473) 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 19 ways as a sum of consecutive naturals, for example, 6573 + ... + 10298.

Almost surely, 2^31430673 is an apocalyptic number.

It is an amenable number.

31430673 is a deficient number, since it is larger than the sum of its proper divisors (17565615).

31430673 is a wasteful number, since it uses less digits than its factorization.

31430673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16906 (or 16897 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 31430673 is about 5606.3065381764. The cubic root of 31430673 is about 315.5861196168.

The spelling of 31430673 in words is "thirty-one million, four hundred thirty thousand, six hundred seventy-three".