556973761 has 2 divisors, whose sum is σ = 556973762. Its totient is φ = 556973760.

The previous prime is 556973731. The next prime is 556973827. The reversal of 556973761 is 167379655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369831361 + 187142400 = 19231^2 + 13680^2 .

It is a cyclic number.

It is not a de Polignac number, because 556973761 - 2²⁵ = 523419329 is a prime.

It is not a weakly prime, because it can be changed into another prime (556973731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278486880 + 278486881.

It is an arithmetic number, because the mean of its divisors is an integer number (278486881).

Almost surely, 2^556973761 is an apocalyptic number.

It is an amenable number.

556973761 is a deficient number, since it is larger than the sum of its proper divisors (1).

556973761 is an equidigital number, since it uses as much as digits as its factorization.

556973761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 49.

The square root of 556973761 is about 23600.2915448094. The cubic root of 556973761 is about 822.7696161274.

The spelling of 556973761 in words is "five hundred fifty-six million, nine hundred seventy-three thousand, seven hundred sixty-one".