5781669 has 4 divisors (see below), whose sum is σ = 7708896. Its totient is φ = 3854444.

The previous prime is 5781661. The next prime is 5781689. The reversal of 5781669 is 9661875.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5781669 - 2³ = 5781661 is a prime.

It is a super-2 number, since 2×5781669² = 66855392851122, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5781669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5781661) 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, 963609 + ... + 963614.

It is an arithmetic number, because the mean of its divisors is an integer number (1927224).

Almost surely, 2^5781669 is an apocalyptic number.

It is an amenable number.

5781669 is a deficient number, since it is larger than the sum of its proper divisors (1927227).

5781669 is a wasteful number, since it uses less digits than its factorization.

5781669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927226.

The product of its digits is 90720, while the sum is 42.

The square root of 5781669 is about 2404.5101372213. The cubic root of 5781669 is about 179.4806945871.

The spelling of 5781669 in words is "five million, seven hundred eighty-one thousand, six hundred sixty-nine".