561025697 has 4 divisors (see below), whose sum is σ = 561074580. Its totient is φ = 560976816.

The previous prime is 561025691. The next prime is 561025753. The reversal of 561025697 is 796520165.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 217887121 + 343138576 = 14761^2 + 18524^2 .

It is a cyclic number.

It is not a de Polignac number, because 561025697 - 2⁸ = 561025441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561025691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3179 + ... + 33647.

It is an arithmetic number, because the mean of its divisors is an integer number (140268645).

Almost surely, 2^561025697 is an apocalyptic number.

It is an amenable number.

561025697 is a deficient number, since it is larger than the sum of its proper divisors (48883).

561025697 is a wasteful number, since it uses less digits than its factorization.

561025697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48882.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 561025697 is about 23685.9810225374. The cubic root of 561025697 is about 824.7599899317.

The spelling of 561025697 in words is "five hundred sixty-one million, twenty-five thousand, six hundred ninety-seven".