556999697 has 4 divisors (see below), whose sum is σ = 560738100. Its totient is φ = 553261296.

The previous prime is 556999693. The next prime is 556999721. The reversal of 556999697 is 796999655.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 362369296 + 194630401 = 19036^2 + 13951^2 .

It is a cyclic number.

It is not a de Polignac number, because 556999697 - 2² = 556999693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556999693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868978 + ... + 1869275.

It is an arithmetic number, because the mean of its divisors is an integer number (140184525).

Almost surely, 2^556999697 is an apocalyptic number.

It is an amenable number.

556999697 is a deficient number, since it is larger than the sum of its proper divisors (3738403).

556999697 is a wasteful number, since it uses less digits than its factorization.

556999697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738402.

The product of its digits is 41334300, while the sum is 65.

The square root of 556999697 is about 23600.8410231500. The cubic root of 556999697 is about 822.7823869393.

The spelling of 556999697 in words is "five hundred fifty-six million, nine hundred ninety-nine thousand, six hundred ninety-seven".