561378893 has 8 divisors (see below), whose sum is σ = 565768896. Its totient is φ = 557006400.

The previous prime is 561378887. The next prime is 561378901. The reversal of 561378893 is 398873165.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561378893 - 2¹⁸ = 561116749 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 (561318893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64088 + ... + 72318.

It is an arithmetic number, because the mean of its divisors is an integer number (70721112).

Almost surely, 2^561378893 is an apocalyptic number.

It is an amenable number.

561378893 is a deficient number, since it is larger than the sum of its proper divisors (4390003).

561378893 is a wasteful number, since it uses less digits than its factorization.

561378893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755.

The product of its digits is 1088640, while the sum is 50.

The square root of 561378893 is about 23693.4356520957. The cubic root of 561378893 is about 824.9330306215.

The spelling of 561378893 in words is "five hundred sixty-one million, three hundred seventy-eight thousand, eight hundred ninety-three".