493646399 has 4 divisors (see below), whose sum is σ = 502960536. Its totient is φ = 484332264.

The previous prime is 493646393. The next prime is 493646411. The reversal of 493646399 is 993646394.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 493646399 - 2²⁸ = 225210943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 9314083 = 493646399 / (4 + 9 + 3 + 6 + 4 + 6 + 3 + 9 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 493646399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493646393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4656989 + ... + 4657094.

It is an arithmetic number, because the mean of its divisors is an integer number (125740134).

Almost surely, 2^493646399 is an apocalyptic number.

493646399 is a deficient number, since it is larger than the sum of its proper divisors (9314137).

493646399 is an equidigital number, since it uses as much as digits as its factorization.

493646399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9314136.

The product of its digits is 3779136, while the sum is 53.

The square root of 493646399 is about 22218.1547163575. The cubic root of 493646399 is about 790.3242801593.

The spelling of 493646399 in words is "four hundred ninety-three million, six hundred forty-six thousand, three hundred ninety-nine".