31459909 has 4 divisors (see below), whose sum is σ = 33879916. Its totient is φ = 29039904.

The previous prime is 31459891. The next prime is 31459931. The reversal of 31459909 is 90995413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8208225 + 23251684 = 2865^2 + 4822^2 .

It is a cyclic number.

It is not a de Polignac number, because 31459909 - 2¹¹ = 31457861 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 (31459949) 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, 1209984 + ... + 1210009.

It is an arithmetic number, because the mean of its divisors is an integer number (8469979).

Almost surely, 2^31459909 is an apocalyptic number.

It is an amenable number.

31459909 is a deficient number, since it is larger than the sum of its proper divisors (2420007).

31459909 is a wasteful number, since it uses less digits than its factorization.

31459909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420006.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 31459909 is about 5608.9133528697. The cubic root of 31459909 is about 315.6839393117.

The spelling of 31459909 in words is "thirty-one million, four hundred fifty-nine thousand, nine hundred nine".