5661983 has 4 divisors (see below), whose sum is σ = 5675208. Its totient is φ = 5648760.

The previous prime is 5661973. The next prime is 5661991. The reversal of 5661983 is 3891665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3891665 = 5 ⋅778333.

It is a cyclic number.

It is not a de Polignac number, because 5661983 - 2⁸ = 5661727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661923) 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 3 ways as a sum of consecutive naturals, for example, 5948 + ... + 6833.

It is an arithmetic number, because the mean of its divisors is an integer number (1418802).

Almost surely, 2^5661983 is an apocalyptic number.

5661983 is a deficient number, since it is larger than the sum of its proper divisors (13225).

5661983 is a wasteful number, since it uses less digits than its factorization.

5661983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13224.

The product of its digits is 38880, while the sum is 38.

The square root of 5661983 is about 2379.4921727125. The cubic root of 5661983 is about 178.2335758685.

The spelling of 5661983 in words is "five million, six hundred sixty-one thousand, nine hundred eighty-three".