47691 has 12 divisors (see below), whose sum is σ = 78832. Its totient is φ = 27216.

The previous prime is 47681. The next prime is 47699. The reversal of 47691 is 19674.

It is not a de Polignac number, because 47691 - 2⁵ = 47659 is a prime.

It is a d-powerful number, because it can be written as 4⁴ + 7² + 6⁶ + 9³ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316 + ... + 441.

2⁴⁷⁶⁹¹ is an apocalyptic number.

47691 is a deficient number, since it is larger than the sum of its proper divisors (31141).

47691 is a wasteful number, since it uses less digits than its factorization.

47691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 767 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 47691 is about 218.3826916218. The cubic root of 47691 is about 36.2642591545.

The spelling of 47691 in words is "forty-seven thousand, six hundred ninety-one".