4989549791 has 4 divisors (see below), whose sum is σ = 4999127184. Its totient is φ = 4979972400.

The previous prime is 4989549787. The next prime is 4989549809. The reversal of 4989549791 is 1979459894.

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

It is a cyclic number.

It is not a de Polignac number, because 4989549791 - 2² = 4989549787 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 (4989549491) 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, 4787915 + ... + 4788956.

It is an arithmetic number, because the mean of its divisors is an integer number (1249781796).

Almost surely, 2^4989549791 is an apocalyptic number.

4989549791 is a deficient number, since it is larger than the sum of its proper divisors (9577393).

4989549791 is an equidigital number, since it uses as much as digits as its factorization.

4989549791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9577392.

The product of its digits is 29393280, while the sum is 65.

The square root of 4989549791 is about 70636.7453313076. The cubic root of 4989549791 is about 1708.7838086826.

The spelling of 4989549791 in words is "four billion, nine hundred eighty-nine million, five hundred forty-nine thousand, seven hundred ninety-one".