4791000091 has 2 divisors, whose sum is σ = 4791000092. Its totient is φ = 4791000090.

The previous prime is 4791000089. The next prime is 4791000127. The reversal of 4791000091 is 1900001974.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4791000091 - 2¹ = 4791000089 is a prime.

Together with 4791000089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4791000191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2395500045 + 2395500046.

It is an arithmetic number, because the mean of its divisors is an integer number (2395500046).

Almost surely, 2^4791000091 is an apocalyptic number.

4791000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

4791000091 is an equidigital number, since it uses as much as digits as its factorization.

4791000091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 4791000091 is about 69217.0505800413. The cubic root of 4791000091 is about 1685.8103908263.

The spelling of 4791000091 in words is "four billion, seven hundred ninety-one million, ninety-one", and thus it is an aban number.