493818139 has 2 divisors, whose sum is σ = 493818140. Its totient is φ = 493818138.

The previous prime is 493818133. The next prime is 493818163. The reversal of 493818139 is 931818394.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 493818139 - 2³ = 493818131 is a prime.

It is not a weakly prime, because it can be changed into another prime (493818131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246909069 + 246909070.

It is an arithmetic number, because the mean of its divisors is an integer number (246909070).

Almost surely, 2^493818139 is an apocalyptic number.

493818139 is a deficient number, since it is larger than the sum of its proper divisors (1).

493818139 is an equidigital number, since it uses as much as digits as its factorization.

493818139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 493818139 is about 22222.0192376840. The cubic root of 493818139 is about 790.4159210282.

The spelling of 493818139 in words is "four hundred ninety-three million, eight hundred eighteen thousand, one hundred thirty-nine".