4987045891 has 4 divisors (see below), whose sum is σ = 4998563752. Its totient is φ = 4975528032.

The previous prime is 4987045883. The next prime is 4987045901. The reversal of 4987045891 is 1985407894.

It is a happy number.

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 4987045891 - 2³ = 4987045883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4987045801) 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, 5758281 + ... + 5759146.

It is an arithmetic number, because the mean of its divisors is an integer number (1249640938).

Almost surely, 2^4987045891 is an apocalyptic number.

4987045891 is a deficient number, since it is larger than the sum of its proper divisors (11517861).

4987045891 is a wasteful number, since it uses less digits than its factorization.

4987045891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11517860.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The square root of 4987045891 is about 70619.0193290731. The cubic root of 4987045891 is about 1708.4979218545.

The spelling of 4987045891 in words is "four billion, nine hundred eighty-seven million, forty-five thousand, eight hundred ninety-one".