4999905 has 12 divisors (see below), whose sum is σ = 8666580. Its totient is φ = 2666592.

The previous prime is 4999889. The next prime is 4999913. The reversal of 4999905 is 5099994.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3381921 + 1617984 = 1839^2 + 1272^2 .

It is not a de Polignac number, because 4999905 - 2⁴ = 4999889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 111109 = 4999905 / (4 + 9 + 9 + 9 + 9 + 0 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55510 + ... + 55599.

It is an arithmetic number, because the mean of its divisors is an integer number (722215).

Almost surely, 2^4999905 is an apocalyptic number.

4999905 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4999905 is a deficient number, since it is larger than the sum of its proper divisors (3666675).

4999905 is a wasteful number, since it uses less digits than its factorization.

4999905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111120 (or 111117 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 4999905 is about 2236.0467347531. The cubic root of 4999905 is about 170.9965116760.

It can be divided in two parts, 499 and 9905, that added together give a square (10404 = 102²).

The spelling of 4999905 in words is "four million, nine hundred ninety-nine thousand, nine hundred five".