561396523 has 8 divisors (see below), whose sum is σ = 576978320. Its totient is φ = 545836320.

The previous prime is 561396469. The next prime is 561396527. The reversal of 561396523 is 325693165.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561396523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561396527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57208 + ... + 66298.

It is an arithmetic number, because the mean of its divisors is an integer number (72122290).

Almost surely, 2^561396523 is an apocalyptic number.

561396523 is a deficient number, since it is larger than the sum of its proper divisors (15581797).

561396523 is a wasteful number, since it uses less digits than its factorization.

561396523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10797.

The product of its digits is 145800, while the sum is 40.

The square root of 561396523 is about 23693.8076931505. The cubic root of 561396523 is about 824.9416661540.

The spelling of 561396523 in words is "five hundred sixty-one million, three hundred ninety-six thousand, five hundred twenty-three".