4191707981 has 2 divisors, whose sum is σ = 4191707982. Its totient is φ = 4191707980.

The previous prime is 4191707963. The next prime is 4191708007. The reversal of 4191707981 is 1897071914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3026100100 + 1165607881 = 55010^2 + 34141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4191707981 is a prime.

It is a super-2 number, since 2×4191707981² = 35140831595958192722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4191707951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2095853990 + 2095853991.

It is an arithmetic number, because the mean of its divisors is an integer number (2095853991).

Almost surely, 2^4191707981 is an apocalyptic number.

It is an amenable number.

4191707981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4191707981 is an equidigital number, since it uses as much as digits as its factorization.

4191707981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 47.

The square root of 4191707981 is about 64743.4010614209. The cubic root of 4191707981 is about 1612.3661543533.

The spelling of 4191707981 in words is "four billion, one hundred ninety-one million, seven hundred seven thousand, nine hundred eighty-one".