4957391191 has 2 divisors, whose sum is σ = 4957391192. Its totient is φ = 4957391190.

The previous prime is 4957391147. The next prime is 4957391261. The reversal of 4957391191 is 1911937594.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4957391191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4957391141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2478695595 + 2478695596.

It is an arithmetic number, because the mean of its divisors is an integer number (2478695596).

Almost surely, 2^4957391191 is an apocalyptic number.

4957391191 is a deficient number, since it is larger than the sum of its proper divisors (1).

4957391191 is an equidigital number, since it uses as much as digits as its factorization.

4957391191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 49.

The square root of 4957391191 is about 70408.7437112750. The cubic root of 4957391191 is about 1705.1047473938.

The spelling of 4957391191 in words is "four billion, nine hundred fifty-seven million, three hundred ninety-one thousand, one hundred ninety-one".