561387067 has 4 divisors (see below), whose sum is σ = 561682440. Its totient is φ = 561091696.

The previous prime is 561387061. The next prime is 561387083. The reversal of 561387067 is 760783165.

561387067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 561387067 - 2¹⁹ = 560862779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561387061) 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, 144817 + ... + 148642.

It is an arithmetic number, because the mean of its divisors is an integer number (140420610).

Almost surely, 2^561387067 is an apocalyptic number.

561387067 is a deficient number, since it is larger than the sum of its proper divisors (295373).

561387067 is a wasteful number, since it uses less digits than its factorization.

561387067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295372.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 561387067 is about 23693.6081465023. The cubic root of 561387067 is about 824.9370344354.

The spelling of 561387067 in words is "five hundred sixty-one million, three hundred eighty-seven thousand, sixty-seven".