493957657 has 2 divisors, whose sum is σ = 493957658. Its totient is φ = 493957656.

The previous prime is 493957577. The next prime is 493957699. The reversal of 493957657 is 756759394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 446223376 + 47734281 = 21124^2 + 6909^2 .

It is a cyclic number.

It is not a de Polignac number, because 493957657 - 2²⁷ = 359739929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 493957598 and 493957607.

It is not a weakly prime, because it can be changed into another prime (493958657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246978828 + 246978829.

It is an arithmetic number, because the mean of its divisors is an integer number (246978829).

Almost surely, 2^493957657 is an apocalyptic number.

It is an amenable number.

493957657 is a deficient number, since it is larger than the sum of its proper divisors (1).

493957657 is an equidigital number, since it uses as much as digits as its factorization.

493957657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7144200, while the sum is 55.

The square root of 493957657 is about 22225.1581996619. The cubic root of 493957657 is about 790.4903525215.

The spelling of 493957657 in words is "four hundred ninety-three million, nine hundred fifty-seven thousand, six hundred fifty-seven".