4990005 has 42 divisors (see below), whose sum is σ = 9227106. Its totient is φ = 2589408.

The previous prime is 4989997. The next prime is 4990019. The reversal of 4990005 is 5000994.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2452356 + 2537649 = 1566^2 + 1593^2 .

It is not a de Polignac number, because 4990005 - 2³ = 4989997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 134847 + ... + 134883.

It is an arithmetic number, because the mean of its divisors is an integer number (219693).

Almost surely, 2^4990005 is an apocalyptic number.

4990005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4990005 is a deficient number, since it is larger than the sum of its proper divisors (4237101).

4990005 is an frugal number, since it uses more digits than its factorization.

4990005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 4990005 is about 2233.8319095223. The cubic root of 4990005 is about 170.8835772630.

Multiplying 4990005 by its product of nonzero digits (1620), we get a square (8083808100 = 89910²).

Adding to 4990005 its reverse (5000994), we get a palindrome (9990999).

The spelling of 4990005 in words is "four million, nine hundred ninety thousand, five".