561275479 has 2 divisors, whose sum is σ = 561275480. Its totient is φ = 561275478.

The previous prime is 561275461. The next prime is 561275489. The reversal of 561275479 is 974572165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561275479 - 2²¹ = 559178327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561275419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280637739 + 280637740.

It is an arithmetic number, because the mean of its divisors is an integer number (280637740).

Almost surely, 2^561275479 is an apocalyptic number.

561275479 is a deficient number, since it is larger than the sum of its proper divisors (1).

561275479 is an equidigital number, since it uses as much as digits as its factorization.

561275479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 46.

The square root of 561275479 is about 23691.2532171686. The cubic root of 561275479 is about 824.8823727001.

The spelling of 561275479 in words is "five hundred sixty-one million, two hundred seventy-five thousand, four hundred seventy-nine".