4991965 has 32 divisors (see below), whose sum is σ = 7309440. Its totient is φ = 3225600.

The previous prime is 4991963. The next prime is 4991977. The reversal of 4991965 is 5691994.

It is not a de Polignac number, because 4991965 - 2¹ = 4991963 is a prime.

It is a super-2 number, since 2×4991965² = 49839429122450, which contains 22 as substring.

4991965 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17625 + ... + 17905.

It is an arithmetic number, because the mean of its divisors is an integer number (228420).

Almost surely, 2^4991965 is an apocalyptic number.

It is an amenable number.

4991965 is a deficient number, since it is larger than the sum of its proper divisors (2317475).

4991965 is a wasteful number, since it uses less digits than its factorization.

4991965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333.

The product of its digits is 87480, while the sum is 43.

The square root of 4991965 is about 2234.2705744829. The cubic root of 4991965 is about 170.9059478464.

The spelling of 4991965 in words is "four million, nine hundred ninety-one thousand, nine hundred sixty-five".