561430679 has 2 divisors, whose sum is σ = 561430680. Its totient is φ = 561430678.

The previous prime is 561430657. The next prime is 561430697. The reversal of 561430679 is 976034165.

Together with next prime (561430697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561430679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561430609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280715339 + 280715340.

It is an arithmetic number, because the mean of its divisors is an integer number (280715340).

Almost surely, 2^561430679 is an apocalyptic number.

561430679 is a deficient number, since it is larger than the sum of its proper divisors (1).

561430679 is an equidigital number, since it uses as much as digits as its factorization.

561430679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 561430679 is about 23694.5284612292. The cubic root of 561430679 is about 824.9583959430.

The spelling of 561430679 in words is "five hundred sixty-one million, four hundred thirty thousand, six hundred seventy-nine".