556009969 has 2 divisors, whose sum is σ = 556009970. Its totient is φ = 556009968.

The previous prime is 556009963. The next prime is 556009999. The reversal of 556009969 is 969900655.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443649969 + 112360000 = 21063^2 + 10600^2 .

It is a cyclic number.

It is not a de Polignac number, because 556009969 - 2¹³ = 556001777 is a prime.

It is a super-2 number, since 2×556009969² = 618294171254761922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (556009963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278004984 + 278004985.

It is an arithmetic number, because the mean of its divisors is an integer number (278004985).

Almost surely, 2^556009969 is an apocalyptic number.

It is an amenable number.

556009969 is a deficient number, since it is larger than the sum of its proper divisors (1).

556009969 is an equidigital number, since it uses as much as digits as its factorization.

556009969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 656100, while the sum is 49.

The square root of 556009969 is about 23579.8636340417. The cubic root of 556009969 is about 822.2947663457.

The spelling of 556009969 in words is "five hundred fifty-six million, nine thousand, nine hundred sixty-nine".