561744499 has 2 divisors, whose sum is σ = 561744500. Its totient is φ = 561744498.

The previous prime is 561744497. The next prime is 561744523. The reversal of 561744499 is 994447165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561744499 - 2¹ = 561744497 is a prime.

It is a super-2 number, since 2×561744499² = 631113764313522002, which contains 22 as substring.

Together with 561744497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (561744497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280872249 + 280872250.

It is an arithmetic number, because the mean of its divisors is an integer number (280872250).

Almost surely, 2^561744499 is an apocalyptic number.

561744499 is a deficient number, since it is larger than the sum of its proper divisors (1).

561744499 is an equidigital number, since it uses as much as digits as its factorization.

561744499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The square root of 561744499 is about 23701.1497400443. The cubic root of 561744499 is about 825.1120748874.

The spelling of 561744499 in words is "five hundred sixty-one million, seven hundred forty-four thousand, four hundred ninety-nine".