31673317 has 4 divisors (see below), whose sum is σ = 34109740. Its totient is φ = 29236896.

The previous prime is 31673303. The next prime is 31673357. The reversal of 31673317 is 71337613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71337613 = 101 ⋅706313.

It can be written as a sum of positive squares in 2 ways, for example, as 20921476 + 10751841 = 4574^2 + 3279^2 .

It is not a de Polignac number, because 31673317 - 2¹⁹ = 31149029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31673357) 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, 1218192 + ... + 1218217.

It is an arithmetic number, because the mean of its divisors is an integer number (8527435).

Almost surely, 2^31673317 is an apocalyptic number.

It is an amenable number.

31673317 is a deficient number, since it is larger than the sum of its proper divisors (2436423).

31673317 is a wasteful number, since it uses less digits than its factorization.

31673317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436422.

The product of its digits is 7938, while the sum is 31.

The square root of 31673317 is about 5627.9052053140. The cubic root of 31673317 is about 316.3961443408.

The spelling of 31673317 in words is "thirty-one million, six hundred seventy-three thousand, three hundred seventeen".