5665979 has 4 divisors (see below), whose sum is σ = 6181080. Its totient is φ = 5150880.

The previous prime is 5665969. The next prime is 5665993. The reversal of 5665979 is 9795665.

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 5665979 - 2¹⁶ = 5600443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5665949) 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, 257534 + ... + 257555.

It is an arithmetic number, because the mean of its divisors is an integer number (1545270).

Almost surely, 2^5665979 is an apocalyptic number.

5665979 is a deficient number, since it is larger than the sum of its proper divisors (515101).

5665979 is a wasteful number, since it uses less digits than its factorization.

5665979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515100.

The product of its digits is 510300, while the sum is 47.

The square root of 5665979 is about 2380.3316995747. The cubic root of 5665979 is about 178.2754960392.

The spelling of 5665979 in words is "five million, six hundred sixty-five thousand, nine hundred seventy-nine".