4979338891 has 2 divisors, whose sum is σ = 4979338892. Its totient is φ = 4979338890.

The previous prime is 4979338853. The next prime is 4979338901. The reversal of 4979338891 is 1988339794.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4979338891 is a prime.

It is not a weakly prime, because it can be changed into another prime (4979338801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2489669445 + 2489669446.

It is an arithmetic number, because the mean of its divisors is an integer number (2489669446).

Almost surely, 2^4979338891 is an apocalyptic number.

4979338891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4979338891 is an equidigital number, since it uses as much as digits as its factorization.

4979338891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 61.

The square root of 4979338891 is about 70564.4307778359. The cubic root of 4979338891 is about 1707.6173616604.

The spelling of 4979338891 in words is "four billion, nine hundred seventy-nine million, three hundred thirty-eight thousand, eight hundred ninety-one".