5621647 has 4 divisors (see below), whose sum is σ = 5644296. Its totient is φ = 5599000.

The previous prime is 5621617. The next prime is 5621653. The reversal of 5621647 is 7461265.

It is a happy number.

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 5621647 - 2¹¹ = 5619599 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621617) 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, 10948 + ... + 11449.

It is an arithmetic number, because the mean of its divisors is an integer number (1411074).

Almost surely, 2^5621647 is an apocalyptic number.

5621647 is a deficient number, since it is larger than the sum of its proper divisors (22649).

5621647 is a wasteful number, since it uses less digits than its factorization.

5621647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22648.

The product of its digits is 10080, while the sum is 31.

The square root of 5621647 is about 2371.0012652886. The cubic root of 5621647 is about 177.8093211245.

It can be divided in two parts, 562 and 1647, that added together give a square (2209 = 47²).

The spelling of 5621647 in words is "five million, six hundred twenty-one thousand, six hundred forty-seven".