5813661 has 16 divisors (see below), whose sum is σ = 8949888. Its totient is φ = 3288000.

The previous prime is 5813627. The next prime is 5813663. The reversal of 5813661 is 1663185.

It is not a de Polignac number, because 5813661 - 2⁹ = 5813149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5813663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751 + ... + 3491.

It is an arithmetic number, because the mean of its divisors is an integer number (559368).

Almost surely, 2^5813661 is an apocalyptic number.

It is an amenable number.

5813661 is a deficient number, since it is larger than the sum of its proper divisors (3136227).

5813661 is a wasteful number, since it uses less digits than its factorization.

5813661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852.

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

The square root of 5813661 is about 2411.1534584095. The cubic root of 5813661 is about 179.8111290507.

The spelling of 5813661 in words is "five million, eight hundred thirteen thousand, six hundred sixty-one".