31374309 has 8 divisors (see below), whose sum is σ = 41877472. Its totient is φ = 20893680.

The previous prime is 31374293. The next prime is 31374311. The reversal of 31374309 is 90347313.

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

It is not a de Polignac number, because 31374309 - 2⁴ = 31374293 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 (31374349) 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, 2059 + ... + 8184.

It is an arithmetic number, because the mean of its divisors is an integer number (5234684).

Almost surely, 2^31374309 is an apocalyptic number.

It is an amenable number.

31374309 is a deficient number, since it is larger than the sum of its proper divisors (10503163).

31374309 is a wasteful number, since it uses less digits than its factorization.

31374309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11267.

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 31374309 is about 5601.2774435837. The cubic root of 31374309 is about 315.3973619721.

The spelling of 31374309 in words is "thirty-one million, three hundred seventy-four thousand, three hundred nine".