5661623 has 8 divisors (see below), whose sum is σ = 6375936. Its totient is φ = 4980600.

The previous prime is 5661613. The next prime is 5661631. The reversal of 5661623 is 3261665.

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 5661623 - 2⁶ = 5661559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7961 + ... + 8642.

It is an arithmetic number, because the mean of its divisors is an integer number (796992).

Almost surely, 2^5661623 is an apocalyptic number.

5661623 is a deficient number, since it is larger than the sum of its proper divisors (714313).

5661623 is a wasteful number, since it uses less digits than its factorization.

5661623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16645.

The product of its digits is 6480, while the sum is 29.

The square root of 5661623 is about 2379.4165251170. The cubic root of 5661623 is about 178.2297983082.

The spelling of 5661623 in words is "five million, six hundred sixty-one thousand, six hundred twenty-three".