499999393 has 4 divisors (see below), whose sum is σ = 529411140. Its totient is φ = 470587648.

The previous prime is 499999391. The next prime is 499999397. The reversal of 499999393 is 393999994.

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

It can be written as a sum of positive squares in 2 ways, for example, as 282643344 + 217356049 = 16812^2 + 14743^2 .

It is a cyclic number.

It is not a de Polignac number, because 499999393 - 2¹ = 499999391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499999391) 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, 14705848 + ... + 14705881.

It is an arithmetic number, because the mean of its divisors is an integer number (132352785).

Almost surely, 2^499999393 is an apocalyptic number.

It is an amenable number.

499999393 is a deficient number, since it is larger than the sum of its proper divisors (29411747).

499999393 is a wasteful number, since it uses less digits than its factorization.

499999393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29411746.

The product of its digits is 19131876, while the sum is 64.

The square root of 499999393 is about 22360.6662020612. Note that the first 3 decimals coincide. The cubic root of 499999393 is about 793.7002047998.

The spelling of 499999393 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, three hundred ninety-three".