557894387 has 2 divisors, whose sum is σ = 557894388. Its totient is φ = 557894386.

The previous prime is 557894369. The next prime is 557894413. The reversal of 557894387 is 783498755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 557894387 - 2¹⁴ = 557878003 is a prime.

It is a super-2 number, since 2×557894387² = 622492294092211538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (557896387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278947193 + 278947194.

It is an arithmetic number, because the mean of its divisors is an integer number (278947194).

Almost surely, 2^557894387 is an apocalyptic number.

557894387 is a deficient number, since it is larger than the sum of its proper divisors (1).

557894387 is an equidigital number, since it uses as much as digits as its factorization.

557894387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8467200, while the sum is 56.

The square root of 557894387 is about 23619.7880388457. The cubic root of 557894387 is about 823.2226872279. Note that the first 3 decimals are identical.

The spelling of 557894387 in words is "five hundred fifty-seven million, eight hundred ninety-four thousand, three hundred eighty-seven".