499949689 has 16 divisors (see below), whose sum is σ = 536637312. Its totient is φ = 464683648.

The previous prime is 499949687. The next prime is 499949699. The reversal of 499949689 is 986949994.

499949689 = T₁₈₂₅₅ + T₁₈₂₅₆ + T₁₈₂₅₇.

It is not a de Polignac number, because 499949689 - 2¹ = 499949687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499949687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128517 + ... + 132349.

It is an arithmetic number, because the mean of its divisors is an integer number (33539832).

Almost surely, 2^499949689 is an apocalyptic number.

499949689 is the 18257-th centered triangular number.

It is an amenable number.

499949689 is a deficient number, since it is larger than the sum of its proper divisors (36687623).

499949689 is a wasteful number, since it uses less digits than its factorization.

499949689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016.

The product of its digits is 45349632, while the sum is 67.

The square root of 499949689 is about 22359.5547585367. The cubic root of 499949689 is about 793.6739038464.

The spelling of 499949689 in words is "four hundred ninety-nine million, nine hundred forty-nine thousand, six hundred eighty-nine".