31472709 has 8 divisors (see below), whose sum is σ = 42538752. Its totient is φ = 20694240.

The previous prime is 31472699. The next prime is 31472723. The reversal of 31472709 is 90727413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31472709 - 2¹¹ = 31470661 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31472709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31472209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71637 + ... + 72074.

It is an arithmetic number, because the mean of its divisors is an integer number (5317344).

Almost surely, 2^31472709 is an apocalyptic number.

It is an amenable number.

31472709 is a deficient number, since it is larger than the sum of its proper divisors (11066043).

31472709 is a wasteful number, since it uses less digits than its factorization.

31472709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143787.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 31472709 is about 5610.0542778123. The cubic root of 31472709 is about 315.7267473030.

The spelling of 31472709 in words is "thirty-one million, four hundred seventy-two thousand, seven hundred nine".