561487323 has 4 divisors (see below), whose sum is σ = 748649768. Its totient is φ = 374324880.

The previous prime is 561487319. The next prime is 561487337. The reversal of 561487323 is 323784165.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 561487323 - 2² = 561487319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561487393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93581218 + ... + 93581223.

It is an arithmetic number, because the mean of its divisors is an integer number (187162442).

Almost surely, 2^561487323 is an apocalyptic number.

561487323 is a deficient number, since it is larger than the sum of its proper divisors (187162445).

561487323 is a wasteful number, since it uses less digits than its factorization.

561487323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187162444.

The product of its digits is 120960, while the sum is 39.

The square root of 561487323 is about 23695.7237281329. The cubic root of 561487323 is about 824.9861389774.

The spelling of 561487323 in words is "five hundred sixty-one million, four hundred eighty-seven thousand, three hundred twenty-three".