841968637 has 2 divisors, whose sum is σ = 841968638. Its totient is φ = 841968636.

The previous prime is 841968619. The next prime is 841968643. The reversal of 841968637 is 736869148.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426257316 + 415711321 = 20646^2 + 20389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-841968637 is a prime.

It is a super-2 number, since 2×841968637² = 1417822371383275538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (841968697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420984318 + 420984319.

It is an arithmetic number, because the mean of its divisors is an integer number (420984319).

Almost surely, 2^841968637 is an apocalyptic number.

It is an amenable number.

841968637 is a deficient number, since it is larger than the sum of its proper divisors (1).

841968637 is an equidigital number, since it uses as much as digits as its factorization.

841968637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The square root of 841968637 is about 29016.6958318827. The cubic root of 841968637 is about 944.2753183625.

The spelling of 841968637 in words is "eight hundred forty-one million, nine hundred sixty-eight thousand, six hundred thirty-seven".