5491669 has 4 divisors (see below), whose sum is σ = 5499180. Its totient is φ = 5484160.

The previous prime is 5491657. The next prime is 5491709. The reversal of 5491669 is 9661945.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3104644 + 2387025 = 1762^2 + 1545^2 .

It is a cyclic number.

It is not a de Polignac number, because 5491669 - 2¹³ = 5483477 is a prime.

It is a super-2 number, since 2×5491669² = 60316856811122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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.

5491669 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5491609) 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, 2524 + ... + 4165.

It is an arithmetic number, because the mean of its divisors is an integer number (1374795).

Almost surely, 2^5491669 is an apocalyptic number.

It is an amenable number.

5491669 is a deficient number, since it is larger than the sum of its proper divisors (7511).

5491669 is an equidigital number, since it uses as much as digits as its factorization.

5491669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7510.

The product of its digits is 58320, while the sum is 40.

The square root of 5491669 is about 2343.4310316286. The cubic root of 5491669 is about 176.4282464798.

It can be divided in two parts, 549166 and 9, that multiplied together give a palindrome (4942494).

The spelling of 5491669 in words is "five million, four hundred ninety-one thousand, six hundred sixty-nine".