5781949 has 4 divisors (see below), whose sum is σ = 5790400. Its totient is φ = 5773500.

The previous prime is 5781911. The next prime is 5781961. The reversal of 5781949 is 9491875.

5781949 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5781949 - 2⁹ = 5781437 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 (5781749) 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, 3099 + ... + 4600.

It is an arithmetic number, because the mean of its divisors is an integer number (1447600).

Almost surely, 2^5781949 is an apocalyptic number.

It is an amenable number.

5781949 is a deficient number, since it is larger than the sum of its proper divisors (8451).

5781949 is an equidigital number, since it uses as much as digits as its factorization.

5781949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450.

The product of its digits is 90720, while the sum is 43.

The square root of 5781949 is about 2404.5683604339. The cubic root of 5781949 is about 179.4835918925.

The spelling of 5781949 in words is "five million, seven hundred eighty-one thousand, nine hundred forty-nine".