561753919 has 2 divisors, whose sum is σ = 561753920. Its totient is φ = 561753918.

The previous prime is 561753901. The next prime is 561753931. The reversal of 561753919 is 919357165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561753919 - 2⁵ = 561753887 is a prime.

It is a super-2 number, since 2×561753919² = 631134931023717122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561756919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280876959 + 280876960.

It is an arithmetic number, because the mean of its divisors is an integer number (280876960).

Almost surely, 2^561753919 is an apocalyptic number.

561753919 is a deficient number, since it is larger than the sum of its proper divisors (1).

561753919 is an equidigital number, since it uses as much as digits as its factorization.

561753919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 255150, while the sum is 46.

The square root of 561753919 is about 23701.3484637478. The cubic root of 561753919 is about 825.1166870152.

It can be divided in two parts, 5617 and 53919, that added together give a square (59536 = 244²).

The spelling of 561753919 in words is "five hundred sixty-one million, seven hundred fifty-three thousand, nine hundred nineteen".