5691647 has 4 divisors (see below), whose sum is σ = 6129480. Its totient is φ = 5253816.

The previous prime is 5691641. The next prime is 5691667. The reversal of 5691647 is 7461965.

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

It is a cyclic number.

It is not a de Polignac number, because 5691647 - 2¹⁰ = 5690623 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 5691647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5691641) 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, 218897 + ... + 218922.

It is an arithmetic number, because the mean of its divisors is an integer number (1532370).

Almost surely, 2^5691647 is an apocalyptic number.

5691647 is a deficient number, since it is larger than the sum of its proper divisors (437833).

5691647 is a wasteful number, since it uses less digits than its factorization.

5691647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437832.

The product of its digits is 45360, while the sum is 38.

The square root of 5691647 is about 2385.7172925558. The cubic root of 5691647 is about 178.5442982326.

The spelling of 5691647 in words is "five million, six hundred ninety-one thousand, six hundred forty-seven".