47731689 has 12 divisors (see below), whose sum is σ = 69012736. Its totient is φ = 31790232.

The previous prime is 47731687. The next prime is 47731711. The reversal of 47731689 is 98613774.

It is not a de Polignac number, because 47731689 - 2¹ = 47731687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47731687) 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, 10944 + ... + 14670.

Almost surely, 2^47731689 is an apocalyptic number.

It is an amenable number.

47731689 is a deficient number, since it is larger than the sum of its proper divisors (21281047).

47731689 is a wasteful number, since it uses less digits than its factorization.

47731689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5156 (or 5153 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 47731689 is about 6908.8124160379. The cubic root of 47731689 is about 362.7456953453.

The spelling of 47731689 in words is "forty-seven million, seven hundred thirty-one thousand, six hundred eighty-nine".