493517789 has 2 divisors, whose sum is σ = 493517790. Its totient is φ = 493517788.

The previous prime is 493517767. The next prime is 493517797. The reversal of 493517789 is 987715394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 489869689 + 3648100 = 22133^2 + 1910^2 .

It is a cyclic number.

It is not a de Polignac number, because 493517789 - 2¹² = 493513693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 493517789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493511789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246758894 + 246758895.

It is an arithmetic number, because the mean of its divisors is an integer number (246758895).

Almost surely, 2^493517789 is an apocalyptic number.

It is an amenable number.

493517789 is a deficient number, since it is larger than the sum of its proper divisors (1).

493517789 is an equidigital number, since it uses as much as digits as its factorization.

493517789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 493517789 is about 22215.2602730645. The cubic root of 493517789 is about 790.2556396411.

The spelling of 493517789 in words is "four hundred ninety-three million, five hundred seventeen thousand, seven hundred eighty-nine".