499739421 has 16 divisors (see below), whose sum is σ = 686816064. Its totient is φ = 323025024.

The previous prime is 499739419. The next prime is 499739479. The reversal of 499739421 is 124937994.

It is a happy number.

It is not a de Polignac number, because 499739421 - 2¹ = 499739419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499739411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3535 + ... + 31811.

It is an arithmetic number, because the mean of its divisors is an integer number (42926004).

Almost surely, 2^499739421 is an apocalyptic number.

It is an amenable number.

499739421 is a deficient number, since it is larger than the sum of its proper divisors (187076643).

499739421 is a wasteful number, since it uses less digits than its factorization.

499739421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28460.

The product of its digits is 489888, while the sum is 48.

The square root of 499739421 is about 22354.8522920640. The cubic root of 499739421 is about 793.5626208983.

The spelling of 499739421 in words is "four hundred ninety-nine million, seven hundred thirty-nine thousand, four hundred twenty-one".