557394961 has 2 divisors, whose sum is σ = 557394962. Its totient is φ = 557394960.

The previous prime is 557394953. The next prime is 557394979. The reversal of 557394961 is 169493755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499254336 + 58140625 = 22344^2 + 7625^2 .

It is a cyclic number.

It is not a de Polignac number, because 557394961 - 2³ = 557394953 is a prime.

It is not a weakly prime, because it can be changed into another prime (557394941) 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, 278697480 + 278697481.

It is an arithmetic number, because the mean of its divisors is an integer number (278697481).

Almost surely, 2^557394961 is an apocalyptic number.

It is an amenable number.

557394961 is a deficient number, since it is larger than the sum of its proper divisors (1).

557394961 is an equidigital number, since it uses as much as digits as its factorization.

557394961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 49.

The square root of 557394961 is about 23609.2134769458. The cubic root of 557394961 is about 822.9769647591.

The spelling of 557394961 in words is "five hundred fifty-seven million, three hundred ninety-four thousand, nine hundred sixty-one".