561341387 has 4 divisors (see below), whose sum is σ = 562000320. Its totient is φ = 560682456.

The previous prime is 561341383. The next prime is 561341401. The reversal of 561341387 is 783143165.

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 561341387 - 2² = 561341383 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 561341387.

It is not an unprimeable number, because it can be changed into a prime (561341383) 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, 328187 + ... + 329892.

It is an arithmetic number, because the mean of its divisors is an integer number (140500080).

Almost surely, 2^561341387 is an apocalyptic number.

561341387 is a deficient number, since it is larger than the sum of its proper divisors (658933).

561341387 is an equidigital number, since it uses as much as digits as its factorization.

561341387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658932.

The product of its digits is 60480, while the sum is 38.

The square root of 561341387 is about 23692.6441538297. The cubic root of 561341387 is about 824.9146588184.

The spelling of 561341387 in words is "five hundred sixty-one million, three hundred forty-one thousand, three hundred eighty-seven".