556969649 has 2 divisors, whose sum is σ = 556969650. Its totient is φ = 556969648.

The previous prime is 556969631. The next prime is 556969703. The reversal of 556969649 is 946969655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499209649 + 57760000 = 22343^2 + 7600^2 .

It is a cyclic number.

It is not a de Polignac number, because 556969649 - 2⁸ = 556969393 is a prime.

It is not a weakly prime, because it can be changed into another prime (556969619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278484824 + 278484825.

It is an arithmetic number, because the mean of its divisors is an integer number (278484825).

Almost surely, 2^556969649 is an apocalyptic number.

It is an amenable number.

556969649 is a deficient number, since it is larger than the sum of its proper divisors (1).

556969649 is an equidigital number, since it uses as much as digits as its factorization.

556969649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15746400, while the sum is 59.

The square root of 556969649 is about 23600.2044270807. The cubic root of 556969649 is about 822.7675913539.

The spelling of 556969649 in words is "five hundred fifty-six million, nine hundred sixty-nine thousand, six hundred forty-nine".