561162983 has 4 divisors (see below), whose sum is σ = 570674280. Its totient is φ = 551651688.

The previous prime is 561162923. The next prime is 561163007. The reversal of 561162983 is 389261165.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561162983 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 561162983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561162923) 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, 4755560 + ... + 4755677.

It is an arithmetic number, because the mean of its divisors is an integer number (142668570).

Almost surely, 2^561162983 is an apocalyptic number.

561162983 is a deficient number, since it is larger than the sum of its proper divisors (9511297).

561162983 is an equidigital number, since it uses as much as digits as its factorization.

561162983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511296.

The product of its digits is 77760, while the sum is 41.

The square root of 561162983 is about 23688.8788886262. The cubic root of 561162983 is about 824.8272588441.

The spelling of 561162983 in words is "five hundred sixty-one million, one hundred sixty-two thousand, nine hundred eighty-three".