5291661 has 4 divisors (see below), whose sum is σ = 7055552. Its totient is φ = 3527772.

The previous prime is 5291653. The next prime is 5291687. The reversal of 5291661 is 1661925.

5291661 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 5291661 - 2³ = 5291653 is a prime.

It is a super-2 number, since 2×5291661² = 56003352277842, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5291621) 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, 881941 + ... + 881946.

It is an arithmetic number, because the mean of its divisors is an integer number (1763888).

Almost surely, 2^5291661 is an apocalyptic number.

It is an amenable number.

5291661 is a deficient number, since it is larger than the sum of its proper divisors (1763891).

5291661 is a wasteful number, since it uses less digits than its factorization.

5291661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763890.

The product of its digits is 3240, while the sum is 30.

The square root of 5291661 is about 2300.3610586167. The cubic root of 5291661 is about 174.2598508799.

The spelling of 5291661 in words is "five million, two hundred ninety-one thousand, six hundred sixty-one".