499999905 has 16 divisors (see below), whose sum is σ = 888888960. Its totient is φ = 266666544.

The previous prime is 499999897. The next prime is 499999909. The reversal of 499999905 is 509999994.

It is not a de Polignac number, because 499999905 - 2³ = 499999897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (499999909) 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, 1851717 + ... + 1851986.

It is an arithmetic number, because the mean of its divisors is an integer number (55555560).

Almost surely, 2^499999905 is an apocalyptic number.

499999905 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

499999905 is a deficient number, since it is larger than the sum of its proper divisors (388889055).

499999905 is a wasteful number, since it uses less digits than its factorization.

499999905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703717 (or 3703711 counting only the distinct ones).

The product of its (nonzero) digits is 10628820, while the sum is 63.

The square root of 499999905 is about 22360.6776507332. The cubic root of 499999905 is about 793.7004757164.

The spelling of 499999905 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred five".