556981933 has 2 divisors, whose sum is σ = 556981934. Its totient is φ = 556981932.

The previous prime is 556981883. The next prime is 556981937. The reversal of 556981933 is 339189655.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 522899689 + 34082244 = 22867^2 + 5838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556981933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556981937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278490966 + 278490967.

It is an arithmetic number, because the mean of its divisors is an integer number (278490967).

Almost surely, 2^556981933 is an apocalyptic number.

It is an amenable number.

556981933 is a deficient number, since it is larger than the sum of its proper divisors (1).

556981933 is an equidigital number, since it uses as much as digits as its factorization.

556981933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 49.

The square root of 556981933 is about 23600.4646776287. The cubic root of 556981933 is about 822.7736400395.

The spelling of 556981933 in words is "five hundred fifty-six million, nine hundred eighty-one thousand, nine hundred thirty-three".