561013423 has 4 divisors (see below), whose sum is σ = 561155040. Its totient is φ = 560871808.

The previous prime is 561013403. The next prime is 561013429. The reversal of 561013423 is 324310165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561013423 - 2¹³ = 561005231 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 (561013429) 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, 64690 + ... + 72847.

It is an arithmetic number, because the mean of its divisors is an integer number (140288760).

Almost surely, 2^561013423 is an apocalyptic number.

561013423 is a deficient number, since it is larger than the sum of its proper divisors (141617).

561013423 is a wasteful number, since it uses less digits than its factorization.

561013423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141616.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 561013423 is about 23685.7219227112. The cubic root of 561013423 is about 824.7539752471.

Adding to 561013423 its reverse (324310165), we get a palindrome (885323588).

The spelling of 561013423 in words is "five hundred sixty-one million, thirteen thousand, four hundred twenty-three".