5661789 has 16 divisors (see below), whose sum is σ = 8663040. Its totient is φ = 3222000.

The previous prime is 5661781. The next prime is 5661797. The reversal of 5661789 is 9871665.

It is an interprime number because it is at equal distance from previous prime (5661781) and next prime (5661797).

It is not a de Polignac number, because 5661789 - 2³ = 5661781 is a prime.

Its product of digits (90720) is a multiple of the sum of its prime divisors (1120).

It is a Curzon number.

5661789 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5661789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7164 + ... + 7914.

It is an arithmetic number, because the mean of its divisors is an integer number (541440).

Almost surely, 2^5661789 is an apocalyptic number.

It is an amenable number.

5661789 is a deficient number, since it is larger than the sum of its proper divisors (3001251).

5661789 is a wasteful number, since it uses less digits than its factorization.

5661789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120.

The product of its digits is 90720, while the sum is 42.

The square root of 5661789 is about 2379.4514073626. The cubic root of 5661789 is about 178.2315402031.

The spelling of 5661789 in words is "five million, six hundred sixty-one thousand, seven hundred eighty-nine".