561279527 has 2 divisors, whose sum is σ = 561279528. Its totient is φ = 561279526.

The previous prime is 561279491. The next prime is 561279541. The reversal of 561279527 is 725972165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561279527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561279127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280639763 + 280639764.

It is an arithmetic number, because the mean of its divisors is an integer number (280639764).

Almost surely, 2^561279527 is an apocalyptic number.

561279527 is a deficient number, since it is larger than the sum of its proper divisors (1).

561279527 is an equidigital number, since it uses as much as digits as its factorization.

561279527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 44.

The square root of 561279527 is about 23691.3386493883. The cubic root of 561279527 is about 824.8843557524.

The spelling of 561279527 in words is "five hundred sixty-one million, two hundred seventy-nine thousand, five hundred twenty-seven".