561900403 has 2 divisors, whose sum is σ = 561900404. Its totient is φ = 561900402.

The previous prime is 561900379. The next prime is 561900407. The reversal of 561900403 is 304009165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561900403 is a prime.

It is not a weakly prime, because it can be changed into another prime (561900407) 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 as a sum of consecutive naturals, namely, 280950201 + 280950202.

It is an arithmetic number, because the mean of its divisors is an integer number (280950202).

Almost surely, 2^561900403 is an apocalyptic number.

561900403 is a deficient number, since it is larger than the sum of its proper divisors (1).

561900403 is an equidigital number, since it uses as much as digits as its factorization.

561900403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 561900403 is about 23704.4384662451. The cubic root of 561900403 is about 825.1884004378.

Adding to 561900403 its reverse (304009165), we get a palindrome (865909568).

The spelling of 561900403 in words is "five hundred sixty-one million, nine hundred thousand, four hundred three".