561055499 has 2 divisors, whose sum is σ = 561055500. Its totient is φ = 561055498.

The previous prime is 561055487. The next prime is 561055519. The reversal of 561055499 is 994550165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561055499 - 2⁴ = 561055483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (561055799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280527749 + 280527750.

It is an arithmetic number, because the mean of its divisors is an integer number (280527750).

Almost surely, 2^561055499 is an apocalyptic number.

561055499 is a deficient number, since it is larger than the sum of its proper divisors (1).

561055499 is an equidigital number, since it uses as much as digits as its factorization.

561055499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 44.

The square root of 561055499 is about 23686.6101204879. The cubic root of 561055499 is about 824.7745935777.

The spelling of 561055499 in words is "five hundred sixty-one million, fifty-five thousand, four hundred ninety-nine".