561347839 has 4 divisors (see below), whose sum is σ = 604528456. Its totient is φ = 518167224.

The previous prime is 561347833. The next prime is 561347849. The reversal of 561347839 is 938743165.

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 561347839 - 2⁵ = 561347807 is a prime.

It is a super-2 number, since 2×561347839² = 630222792699939842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561347833) 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, 21590289 + ... + 21590314.

It is an arithmetic number, because the mean of its divisors is an integer number (151132114).

Almost surely, 2^561347839 is an apocalyptic number.

561347839 is a deficient number, since it is larger than the sum of its proper divisors (43180617).

561347839 is a wasteful number, since it uses less digits than its factorization.

561347839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43180616.

The product of its digits is 544320, while the sum is 46.

The square root of 561347839 is about 23692.7803138424. The cubic root of 561347839 is about 824.9178193010.

The spelling of 561347839 in words is "five hundred sixty-one million, three hundred forty-seven thousand, eight hundred thirty-nine".