4491606997 has 4 divisors (see below), whose sum is σ = 4515123456. Its totient is φ = 4468090540.

The previous prime is 4491606979. The next prime is 4491607039. The reversal of 4491606997 is 7996061944.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4491606997 - 2¹⁵ = 4491574229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491666997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11757943 + ... + 11758324.

It is an arithmetic number, because the mean of its divisors is an integer number (1128780864).

Almost surely, 2^4491606997 is an apocalyptic number.

It is an amenable number.

4491606997 is a deficient number, since it is larger than the sum of its proper divisors (23516459).

4491606997 is a wasteful number, since it uses less digits than its factorization.

4491606997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23516458.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The square root of 4491606997 is about 67019.4523776493. The cubic root of 4491606997 is about 1649.9365750949.

The spelling of 4491606997 in words is "four billion, four hundred ninety-one million, six hundred six thousand, nine hundred ninety-seven".