561356797 has 4 divisors (see below), whose sum is σ = 564932476. Its totient is φ = 557781120.

The previous prime is 561356771. The next prime is 561356833. The reversal of 561356797 is 797653165.

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 309372921 + 251983876 = 17589^2 + 15874^2 .

It is a cyclic number.

It is not a de Polignac number, because 561356797 - 2¹¹ = 561354749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561356797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561356737) 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, 1787604 + ... + 1787917.

It is an arithmetic number, because the mean of its divisors is an integer number (141233119).

Almost surely, 2^561356797 is an apocalyptic number.

It is an amenable number.

561356797 is a deficient number, since it is larger than the sum of its proper divisors (3575679).

561356797 is a wasteful number, since it uses less digits than its factorization.

561356797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575678.

The product of its digits is 1190700, while the sum is 49.

The square root of 561356797 is about 23692.9693580184. The cubic root of 561356797 is about 824.9222072960.

The spelling of 561356797 in words is "five hundred sixty-one million, three hundred fifty-six thousand, seven hundred ninety-seven".