5381661 has 4 divisors (see below), whose sum is σ = 7175552. Its totient is φ = 3587772.

The previous prime is 5381653. The next prime is 5381669. The reversal of 5381661 is 1661835.

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 an interprime number because it is at equal distance from previous prime (5381653) and next prime (5381669).

It is not a de Polignac number, because 5381661 - 2³ = 5381653 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5381669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896941 + ... + 896946.

It is an arithmetic number, because the mean of its divisors is an integer number (1793888).

Almost surely, 2^5381661 is an apocalyptic number.

It is an amenable number.

5381661 is a deficient number, since it is larger than the sum of its proper divisors (1793891).

5381661 is a wasteful number, since it uses less digits than its factorization.

5381661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793890.

The product of its digits is 4320, while the sum is 30.

The square root of 5381661 is about 2319.8407272914. The cubic root of 5381661 is about 175.2422332559.

The spelling of 5381661 in words is "five million, three hundred eighty-one thousand, six hundred sixty-one".