4991003 has 4 divisors (see below), whose sum is σ = 5024208. Its totient is φ = 4957800.

The previous prime is 4990981. The next prime is 4991009. The reversal of 4991003 is 3001994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3001994 = 2 ⋅1500997.

It is a cyclic number.

It is not a de Polignac number, because 4991003 - 2¹⁰ = 4989979 is a prime.

It is a super-2 number, since 2×4991003² = 49820221892018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4991009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16376 + ... + 16677.

It is an arithmetic number, because the mean of its divisors is an integer number (1256052).

Almost surely, 2^4991003 is an apocalyptic number.

4991003 is a deficient number, since it is larger than the sum of its proper divisors (33205).

4991003 is a wasteful number, since it uses less digits than its factorization.

4991003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33204.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 4991003 is about 2234.0552813214. The cubic root of 4991003 is about 170.8949687307.

Adding to 4991003 its reverse (3001994), we get a palindrome (7992997).

The spelling of 4991003 in words is "four million, nine hundred ninety-one thousand, three".