493418389 has 2 divisors, whose sum is σ = 493418390. Its totient is φ = 493418388.

The previous prime is 493418381. The next prime is 493418407. The reversal of 493418389 is 983814394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273637764 + 219780625 = 16542^2 + 14825^2 .

It is a cyclic number.

It is not a de Polignac number, because 493418389 - 2³ = 493418381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493418381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246709194 + 246709195.

It is an arithmetic number, because the mean of its divisors is an integer number (246709195).

Almost surely, 2^493418389 is an apocalyptic number.

It is an amenable number.

493418389 is a deficient number, since it is larger than the sum of its proper divisors (1).

493418389 is an equidigital number, since it uses as much as digits as its factorization.

493418389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 49.

The square root of 493418389 is about 22213.0229595163. The cubic root of 493418389 is about 790.2025806385.

The spelling of 493418389 in words is "four hundred ninety-three million, four hundred eighteen thousand, three hundred eighty-nine".