5781389 has 4 divisors (see below), whose sum is σ = 5787900. Its totient is φ = 5774880.

The previous prime is 5781383. The next prime is 5781409. The reversal of 5781389 is 9831875.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2044900 + 3736489 = 1430^2 + 1933^2 .

It is a cyclic number.

It is not a de Polignac number, because 5781389 - 2⁸ = 5781133 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 (5781383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664 + ... + 3785.

It is an arithmetic number, because the mean of its divisors is an integer number (1446975).

Almost surely, 2^5781389 is an apocalyptic number.

It is an amenable number.

5781389 is a deficient number, since it is larger than the sum of its proper divisors (6511).

5781389 is a wasteful number, since it uses less digits than its factorization.

5781389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510.

The product of its digits is 60480, while the sum is 41.

The square root of 5781389 is about 2404.4519125988. The cubic root of 5781389 is about 179.4777971881.

The spelling of 5781389 in words is "five million, seven hundred eighty-one thousand, three hundred eighty-nine".