561047399 has 4 divisors (see below), whose sum is σ = 612051720. Its totient is φ = 510043080.

The previous prime is 561047339. The next prime is 561047401. The reversal of 561047399 is 993740165.

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 561047399 - 2²⁰ = 559998823 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 (561047339) 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, 25502144 + ... + 25502165.

It is an arithmetic number, because the mean of its divisors is an integer number (153012930).

Almost surely, 2^561047399 is an apocalyptic number.

561047399 is a deficient number, since it is larger than the sum of its proper divisors (51004321).

561047399 is a wasteful number, since it uses less digits than its factorization.

561047399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51004320.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 561047399 is about 23686.4391371941. The cubic root of 561047399 is about 824.7706244479.

The spelling of 561047399 in words is "five hundred sixty-one million, forty-seven thousand, three hundred ninety-nine".