561790129 has 4 divisors (see below), whose sum is σ = 576973684. Its totient is φ = 546606576.

The previous prime is 561790123. The next prime is 561790181. The reversal of 561790129 is 921097165.

561790129 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.

It can be written as a sum of positive squares in 2 ways, for example, as 273571600 + 288218529 = 16540^2 + 16977^2 .

It is a cyclic number.

It is not a de Polignac number, because 561790129 - 2¹¹ = 561788081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561790091 and 561790100.

It is not an unprimeable number, because it can be changed into a prime (561790123) 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, 7591722 + ... + 7591795.

It is an arithmetic number, because the mean of its divisors is an integer number (144243421).

Almost surely, 2^561790129 is an apocalyptic number.

It is an amenable number.

561790129 is a deficient number, since it is larger than the sum of its proper divisors (15183555).

561790129 is a wasteful number, since it uses less digits than its factorization.

561790129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15183554.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 561790129 is about 23702.1123320264. The cubic root of 561790129 is about 825.1344153195.

The spelling of 561790129 in words is "five hundred sixty-one million, seven hundred ninety thousand, one hundred twenty-nine".