7843911461 has 2 divisors, whose sum is σ = 7843911462. Its totient is φ = 7843911460.

The previous prime is 7843911443. The next prime is 7843911463. The reversal of 7843911461 is 1641193487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7038203236 + 805708225 = 83894^2 + 28385^2 .

It is an emirp because it is prime and its reverse (1641193487) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7843911461 is a prime.

Together with 7843911463, 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 (7843911463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921955730 + 3921955731.

It is an arithmetic number, because the mean of its divisors is an integer number (3921955731).

Almost surely, 2^7843911461 is an apocalyptic number.

It is an amenable number.

7843911461 is a deficient number, since it is larger than the sum of its proper divisors (1).

7843911461 is an equidigital number, since it uses as much as digits as its factorization.

7843911461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 7843911461 is about 88565.8594549841. The cubic root of 7843911461 is about 1986.9070967286.

The spelling of 7843911461 in words is "seven billion, eight hundred forty-three million, nine hundred eleven thousand, four hundred sixty-one".