561241783 has 4 divisors (see below), whose sum is σ = 564958768. Its totient is φ = 557524800.

The previous prime is 561241753. The next prime is 561241787. The reversal of 561241783 is 387142165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 387142165 = 5 ⋅77428433.

It is a cyclic number.

It is not a de Polignac number, because 561241783 - 2²¹ = 559144631 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 (561241787) 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, 1858266 + ... + 1858567.

It is an arithmetic number, because the mean of its divisors is an integer number (141239692).

Almost surely, 2^561241783 is an apocalyptic number.

561241783 is a deficient number, since it is larger than the sum of its proper divisors (3716985).

561241783 is a wasteful number, since it uses less digits than its factorization.

561241783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716984.

The product of its digits is 40320, while the sum is 37.

The square root of 561241783 is about 23690.5420579606. The cubic root of 561241783 is about 824.8658651836.

The spelling of 561241783 in words is "five hundred sixty-one million, two hundred forty-one thousand, seven hundred eighty-three".