31648913 has 8 divisors (see below), whose sum is σ = 32260800. Its totient is φ = 31043088.

The previous prime is 31648909. The next prime is 31648933. The reversal of 31648913 is 31984613.

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

It is a cyclic number.

It is not a de Polignac number, because 31648913 - 2² = 31648909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31648933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9818 + ... + 12636.

It is an arithmetic number, because the mean of its divisors is an integer number (4032600).

Almost surely, 2^31648913 is an apocalyptic number.

It is an amenable number.

31648913 is a deficient number, since it is larger than the sum of its proper divisors (611887).

31648913 is a wasteful number, since it uses less digits than its factorization.

31648913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031.

The product of its digits is 15552, while the sum is 35.

The square root of 31648913 is about 5625.7366628736. The cubic root of 31648913 is about 316.3148633535.

The spelling of 31648913 in words is "thirty-one million, six hundred forty-eight thousand, nine hundred thirteen".