47931661 has 8 divisors (see below), whose sum is σ = 50796000. Its totient is φ = 45101520.

The previous prime is 47931647. The next prime is 47931679. The reversal of 47931661 is 16613974.

47931661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 47931661 - 2²⁵ = 14377229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47931661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47931601) 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, 5635 + ... + 11296.

It is an arithmetic number, because the mean of its divisors is an integer number (6349500).

Almost surely, 2^47931661 is an apocalyptic number.

It is an amenable number.

47931661 is a deficient number, since it is larger than the sum of its proper divisors (2864339).

47931661 is a wasteful number, since it uses less digits than its factorization.

47931661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17099.

The product of its digits is 27216, while the sum is 37.

The square root of 47931661 is about 6923.2695310814. The cubic root of 47931661 is about 363.2515641444.

The spelling of 47931661 in words is "forty-seven million, nine hundred thirty-one thousand, six hundred sixty-one".