31348109 has 4 divisors (see below), whose sum is σ = 33759516. Its totient is φ = 28936704.

The previous prime is 31348087. The next prime is 31348117. The reversal of 31348109 is 90184313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90184313 = 373 ⋅241781.

It can be written as a sum of positive squares in 2 ways, for example, as 1612900 + 29735209 = 1270^2 + 5453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31348109 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 (31348199) 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, 1205684 + ... + 1205709.

It is an arithmetic number, because the mean of its divisors is an integer number (8439879).

Almost surely, 2^31348109 is an apocalyptic number.

It is an amenable number.

31348109 is a deficient number, since it is larger than the sum of its proper divisors (2411407).

31348109 is a wasteful number, since it uses less digits than its factorization.

31348109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411406.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 31348109 is about 5598.9382029095. The cubic root of 31348109 is about 315.3095437070.

The spelling of 31348109 in words is "thirty-one million, three hundred forty-eight thousand, one hundred nine".