4979811491 has 2 divisors, whose sum is σ = 4979811492. Its totient is φ = 4979811490.

The previous prime is 4979811461. The next prime is 4979811503. The reversal of 4979811491 is 1941189794.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4979811491 - 2¹⁸ = 4979549347 is a prime.

It is not a weakly prime, because it can be changed into another prime (4979811451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2489905745 + 2489905746.

It is an arithmetic number, because the mean of its divisors is an integer number (2489905746).

Almost surely, 2^4979811491 is an apocalyptic number.

4979811491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4979811491 is an equidigital number, since it uses as much as digits as its factorization.

4979811491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 53.

The square root of 4979811491 is about 70567.7794110031. The cubic root of 4979811491 is about 1707.6713845238.

The spelling of 4979811491 in words is "four billion, nine hundred seventy-nine million, eight hundred eleven thousand, four hundred ninety-one".