561090734 has 4 divisors (see below), whose sum is σ = 841636104. Its totient is φ = 280545366.

The previous prime is 561090721. The next prime is 561090743. The reversal of 561090734 is 437090165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 437090165 = 5 ⋅87418033.

It is a junction number, because it is equal to n+sod(n) for n = 561090694 and 561090703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140272682 + ... + 140272685.

It is an arithmetic number, because the mean of its divisors is an integer number (210409026).

Almost surely, 2^561090734 is an apocalyptic number.

561090734 is a deficient number, since it is larger than the sum of its proper divisors (280545370).

561090734 is a wasteful number, since it uses less digits than its factorization.

561090734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280545369.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 561090734 is about 23687.3538834544. The cubic root of 561090734 is about 824.7918588480.

The spelling of 561090734 in words is "five hundred sixty-one million, ninety thousand, seven hundred thirty-four".