4991449807 has 8 divisors (see below), whose sum is σ = 5025256992. Its totient is φ = 4957689600.

The previous prime is 4991449789. The next prime is 4991449871. The reversal of 4991449807 is 7089441994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4991449807 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 (4991449907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216307 + ... + 238267.

It is an arithmetic number, because the mean of its divisors is an integer number (628157124).

Almost surely, 2^4991449807 is an apocalyptic number.

4991449807 is a deficient number, since it is larger than the sum of its proper divisors (33807185).

4991449807 is a wasteful number, since it uses less digits than its factorization.

4991449807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23489.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The square root of 4991449807 is about 70650.1932552205. The cubic root of 4991449807 is about 1709.0006822607. Note that the first 3 decimals are identical.

The spelling of 4991449807 in words is "four billion, nine hundred ninety-one million, four hundred forty-nine thousand, eight hundred seven".