4313281991 has 2 divisors, whose sum is σ = 4313281992. Its totient is φ = 4313281990.

The previous prime is 4313281963. The next prime is 4313281997. The reversal of 4313281991 is 1991823134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4313281991 - 2⁶ = 4313281927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4313281997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2156640995 + 2156640996.

It is an arithmetic number, because the mean of its divisors is an integer number (2156640996).

Almost surely, 2^4313281991 is an apocalyptic number.

4313281991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4313281991 is an equidigital number, since it uses as much as digits as its factorization.

4313281991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 4313281991 is about 65675.5813906508. The cubic root of 4313281991 is about 1627.8058966798.

The spelling of 4313281991 in words is "four billion, three hundred thirteen million, two hundred eighty-one thousand, nine hundred ninety-one".