561911349 has 4 divisors (see below), whose sum is σ = 749215136. Its totient is φ = 374607564.

The previous prime is 561911303. The next prime is 561911359. The reversal of 561911349 is 943119165.

561911349 is digitally balanced in base 2, 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 not a de Polignac number, because 561911349 - 2¹⁶ = 561845813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561911359) 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, 93651889 + ... + 93651894.

It is an arithmetic number, because the mean of its divisors is an integer number (187303784).

Almost surely, 2^561911349 is an apocalyptic number.

It is an amenable number.

561911349 is a deficient number, since it is larger than the sum of its proper divisors (187303787).

561911349 is a wasteful number, since it uses less digits than its factorization.

561911349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187303786.

The product of its digits is 29160, while the sum is 39.

The square root of 561911349 is about 23704.6693501512. The cubic root of 561911349 is about 825.1937587145.

The spelling of 561911349 in words is "five hundred sixty-one million, nine hundred eleven thousand, three hundred forty-nine".