561400487 has 2 divisors, whose sum is σ = 561400488. Its totient is φ = 561400486.

The previous prime is 561400471. The next prime is 561400501. The reversal of 561400487 is 784004165.

561400487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561400487 - 2⁴ = 561400471 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561400417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280700243 + 280700244.

It is an arithmetic number, because the mean of its divisors is an integer number (280700244).

Almost surely, 2^561400487 is an apocalyptic number.

561400487 is a deficient number, since it is larger than the sum of its proper divisors (1).

561400487 is an equidigital number, since it uses as much as digits as its factorization.

561400487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 561400487 is about 23693.8913435510. The cubic root of 561400487 is about 824.9436077769.

The spelling of 561400487 in words is "five hundred sixty-one million, four hundred thousand, four hundred eighty-seven".