31340409 has 8 divisors (see below), whose sum is σ = 42218400. Its totient is φ = 20678016.

The previous prime is 31340381. The next prime is 31340417. The reversal of 31340409 is 90404313.

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

It is not a de Polignac number, because 31340409 - 2¹² = 31336313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31340459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53559 + ... + 54140.

It is an arithmetic number, because the mean of its divisors is an integer number (5277300).

Almost surely, 2^31340409 is an apocalyptic number.

It is an amenable number.

31340409 is a deficient number, since it is larger than the sum of its proper divisors (10877991).

31340409 is a wasteful number, since it uses less digits than its factorization.

31340409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107799.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31340409 is about 5598.2505302996. The cubic root of 31340409 is about 315.2837252193.

The spelling of 31340409 in words is "thirty-one million, three hundred forty thousand, four hundred nine".