561246913 has 4 divisors (see below), whose sum is σ = 568009008. Its totient is φ = 554484820.

The previous prime is 561246911. The next prime is 561246929. The reversal of 561246913 is 319642165.

561246913 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 561246913 - 2¹ = 561246911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561246911) 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, 3380923 + ... + 3381088.

It is an arithmetic number, because the mean of its divisors is an integer number (142002252).

Almost surely, 2^561246913 is an apocalyptic number.

It is an amenable number.

561246913 is a deficient number, since it is larger than the sum of its proper divisors (6762095).

561246913 is an equidigital number, since it uses as much as digits as its factorization.

561246913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6762094.

The product of its digits is 38880, while the sum is 37.

The square root of 561246913 is about 23690.6503287689. The cubic root of 561246913 is about 824.8683783898.

It can be divided in two parts, 5612 and 46913, that added together give a palindrome (52525).

The spelling of 561246913 in words is "five hundred sixty-one million, two hundred forty-six thousand, nine hundred thirteen".