4991533 has 4 divisors (see below), whose sum is σ = 5003100. Its totient is φ = 4979968.

The previous prime is 4991507. The next prime is 4991543. The reversal of 4991533 is 3351994.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1671849 + 3319684 = 1293^2 + 1822^2 .

It is a cyclic number.

It is not a de Polignac number, because 4991533 - 2¹⁷ = 4860461 is a prime.

It is a Duffinian number.

4991533 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991543) 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, 5110 + ... + 6007.

It is an arithmetic number, because the mean of its divisors is an integer number (1250775).

Almost surely, 2^4991533 is an apocalyptic number.

It is an amenable number.

4991533 is a deficient number, since it is larger than the sum of its proper divisors (11567).

4991533 is a wasteful number, since it uses less digits than its factorization.

4991533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11566.

The product of its digits is 14580, while the sum is 34.

The square root of 4991533 is about 2234.1738965443. The cubic root of 4991533 is about 170.9010176904.

The spelling of 4991533 in words is "four million, nine hundred ninety-one thousand, five hundred thirty-three".