561201623 has 2 divisors, whose sum is σ = 561201624. Its totient is φ = 561201622.

The previous prime is 561201611. The next prime is 561201631. The reversal of 561201623 is 326102165.

561201623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561201623 - 2²⁶ = 494092759 is a prime.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 561201592 and 561201601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561201653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280600811 + 280600812.

It is an arithmetic number, because the mean of its divisors is an integer number (280600812).

Almost surely, 2^561201623 is an apocalyptic number.

561201623 is a deficient number, since it is larger than the sum of its proper divisors (1).

561201623 is an equidigital number, since it uses as much as digits as its factorization.

561201623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 561201623 is about 23689.6944471642. The cubic root of 561201623 is about 824.8461901201.

Adding to 561201623 its reverse (326102165), we get a palindrome (887303788).

The spelling of 561201623 in words is "five hundred sixty-one million, two hundred one thousand, six hundred twenty-three".