4940008891 has 4 divisors (see below), whose sum is σ = 4940395000. Its totient is φ = 4939622784.

The previous prime is 4940008877. The next prime is 4940008921. The reversal of 4940008891 is 1988000494.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1988000494 = 2 ⋅994000247.

It is a cyclic number.

It is not a de Polignac number, because 4940008891 - 2⁷ = 4940008763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4940008831) 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, 173181 + ... + 199678.

It is an arithmetic number, because the mean of its divisors is an integer number (1235098750).

Almost surely, 2^4940008891 is an apocalyptic number.

4940008891 is a deficient number, since it is larger than the sum of its proper divisors (386109).

4940008891 is a wasteful number, since it uses less digits than its factorization.

4940008891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386108.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 4940008891 is about 70285.1968127002. The cubic root of 4940008891 is about 1703.1095211548.

The spelling of 4940008891 in words is "four billion, nine hundred forty million, eight thousand, eight hundred ninety-one".