31713123 has 8 divisors (see below), whose sum is σ = 45536848. Its totient is φ = 19515744.

The previous prime is 31713061. The next prime is 31713127. The reversal of 31713123 is 32131713.

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

It is not a de Polignac number, because 31713123 - 2¹⁰ = 31712099 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 31713123.

It is not an unprimeable number, because it can be changed into a prime (31713127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406540 + ... + 406617.

It is an arithmetic number, because the mean of its divisors is an integer number (5692106).

Almost surely, 2^31713123 is an apocalyptic number.

31713123 is a deficient number, since it is larger than the sum of its proper divisors (13823725).

31713123 is a wasteful number, since it uses less digits than its factorization.

31713123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813173.

The product of its digits is 378, while the sum is 21.

The square root of 31713123 is about 5631.4405794610. The cubic root of 31713123 is about 316.5286343322.

Adding to 31713123 its reverse (32131713), we get a palindrome (63844836).

The spelling of 31713123 in words is "thirty-one million, seven hundred thirteen thousand, one hundred twenty-three".