493055557 has 2 divisors, whose sum is σ = 493055558. Its totient is φ = 493055556.

The previous prime is 493055551. The next prime is 493055561. The reversal of 493055557 is 755550394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 459716481 + 33339076 = 21441^2 + 5774^2 .

It is a cyclic number.

It is not a de Polignac number, because 493055557 - 2⁷ = 493055429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493055551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246527778 + 246527779.

It is an arithmetic number, because the mean of its divisors is an integer number (246527779).

Almost surely, 2^493055557 is an apocalyptic number.

It is an amenable number.

493055557 is a deficient number, since it is larger than the sum of its proper divisors (1).

493055557 is an equidigital number, since it uses as much as digits as its factorization.

493055557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472500, while the sum is 43.

The square root of 493055557 is about 22204.8543566491. The cubic root of 493055557 is about 790.0088430351.

The spelling of 493055557 in words is "four hundred ninety-three million, fifty-five thousand, five hundred fifty-seven".