561279073 has 2 divisors, whose sum is σ = 561279074. Its totient is φ = 561279072.

The previous prime is 561279049. The next prime is 561279091. The reversal of 561279073 is 370972165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553755024 + 7524049 = 23532^2 + 2743^2 .

It is a cyclic number.

It is not a de Polignac number, because 561279073 - 2¹⁷ = 561148001 is a prime.

It is not a weakly prime, because it can be changed into another prime (561279673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280639536 + 280639537.

It is an arithmetic number, because the mean of its divisors is an integer number (280639537).

Almost surely, 2^561279073 is an apocalyptic number.

It is an amenable number.

561279073 is a deficient number, since it is larger than the sum of its proper divisors (1).

561279073 is an equidigital number, since it uses as much as digits as its factorization.

561279073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 561279073 is about 23691.3290678256. The cubic root of 561279073 is about 824.8841333453.

The spelling of 561279073 in words is "five hundred sixty-one million, two hundred seventy-nine thousand, seventy-three".