499949993 has 2 divisors, whose sum is σ = 499949994. Its totient is φ = 499949992.

The previous prime is 499949971. The next prime is 499950019. The reversal of 499949993 is 399949994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 454414489 + 45535504 = 21317^2 + 6748^2 .

It is a cyclic number.

It is not a de Polignac number, because 499949993 - 2⁶ = 499949929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (499949393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249974996 + 249974997.

It is an arithmetic number, because the mean of its divisors is an integer number (249974997).

Almost surely, 2^499949993 is an apocalyptic number.

It is an amenable number.

499949993 is a deficient number, since it is larger than the sum of its proper divisors (1).

499949993 is an equidigital number, since it uses as much as digits as its factorization.

499949993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25509168, while the sum is 65.

The square root of 499949993 is about 22359.5615565243. The cubic root of 499949993 is about 793.6740647138.

Subtracting from 499949993 its reverse (399949994), we obtain a palindrome (99999999).

The spelling of 499949993 in words is "four hundred ninety-nine million, nine hundred forty-nine thousand, nine hundred ninety-three".