4989905 has 16 divisors (see below), whose sum is σ = 6220368. Its totient is φ = 3840000.

The previous prime is 4989863. The next prime is 4989917. The reversal of 4989905 is 5099894.

It can be written as a sum of positive squares in 8 ways, for example, as 25921 + 4963984 = 161^2 + 2228^2 .

It is not a de Polignac number, because 4989905 - 2⁶ = 4989841 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20585 + ... + 20825.

It is an arithmetic number, because the mean of its divisors is an integer number (388773).

Almost surely, 2^4989905 is an apocalyptic number.

It is an amenable number.

4989905 is a deficient number, since it is larger than the sum of its proper divisors (1230463).

4989905 is a wasteful number, since it uses less digits than its factorization.

4989905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 4989905 is about 2233.8095263473. The cubic root of 4989905 is about 170.8824357497.

The spelling of 4989905 in words is "four million, nine hundred eighty-nine thousand, nine hundred five".