4988891 has 2 divisors, whose sum is σ = 4988892. Its totient is φ = 4988890.

The previous prime is 4988843. The next prime is 4988917. The reversal of 4988891 is 1988894.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4988891 - 2¹⁰ = 4987867 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4988831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494445 + 2494446.

It is an arithmetic number, because the mean of its divisors is an integer number (2494446).

Almost surely, 2^4988891 is an apocalyptic number.

4988891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4988891 is an equidigital number, since it uses as much as digits as its factorization.

4988891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 47.

The square root of 4988891 is about 2233.5825482843. The cubic root of 4988891 is about 170.8708599429.

The spelling of 4988891 in words is "four million, nine hundred eighty-eight thousand, eight hundred ninety-one".