561191363 has 2 divisors, whose sum is σ = 561191364. Its totient is φ = 561191362.

The previous prime is 561191347. The next prime is 561191377. The reversal of 561191363 is 363191165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561191363 - 2⁴ = 561191347 is a prime.

It is not a weakly prime, because it can be changed into another prime (561191863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280595681 + 280595682.

It is an arithmetic number, because the mean of its divisors is an integer number (280595682).

Almost surely, 2^561191363 is an apocalyptic number.

561191363 is a deficient number, since it is larger than the sum of its proper divisors (1).

561191363 is an equidigital number, since it uses as much as digits as its factorization.

561191363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 35.

The square root of 561191363 is about 23689.4778963151. The cubic root of 561191363 is about 824.8411634219.

The spelling of 561191363 in words is "five hundred sixty-one million, one hundred ninety-one thousand, three hundred sixty-three".