4195747991 has 2 divisors, whose sum is σ = 4195747992. Its totient is φ = 4195747990.

The previous prime is 4195747981. The next prime is 4195747993. The reversal of 4195747991 is 1997475914.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4195747991 - 2¹⁴ = 4195731607 is a prime.

Together with 4195747993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4195747993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097873995 + 2097873996.

It is an arithmetic number, because the mean of its divisors is an integer number (2097873996).

Almost surely, 2^4195747991 is an apocalyptic number.

4195747991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4195747991 is an equidigital number, since it uses as much as digits as its factorization.

4195747991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 56.

The square root of 4195747991 is about 64774.5937154375. The cubic root of 4195747991 is about 1612.8839928884.

The spelling of 4195747991 in words is "four billion, one hundred ninety-five million, seven hundred forty-seven thousand, nine hundred ninety-one".