5639761 has 8 divisors (see below), whose sum is σ = 5967360. Its totient is φ = 5319072.

The previous prime is 5639759. The next prime is 5639773. The reversal of 5639761 is 1679365.

5639761 is a nontrivial binomial coefficient, being equal to C(3359, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5639761 - 2¹ = 5639759 is a prime.

It is a Duffinian number.

5639761 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5639761.

It is not an unprimeable number, because it can be changed into a prime (5639741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 3358.

It is an arithmetic number, because the mean of its divisors is an integer number (745920).

Almost surely, 2^5639761 is an apocalyptic number.

5639761 is the 3358-th triangular number.

5639761 is the 1120-th centered nonagonal number.

It is an amenable number.

5639761 is a deficient number, since it is larger than the sum of its proper divisors (327599).

5639761 is a wasteful number, since it uses less digits than its factorization.

5639761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455.

The product of its digits is 34020, while the sum is 37.

The square root of 5639761 is about 2374.8180982972. The cubic root of 5639761 is about 178.0000946850. Note that the first 4 decimals are identical.

It can be divided in two parts, 5639 and 761, that added together give a square (6400 = 80²).

The spelling of 5639761 in words is "five million, six hundred thirty-nine thousand, seven hundred sixty-one".