843495949 has 2 divisors, whose sum is σ = 843495950. Its totient is φ = 843495948.

The previous prime is 843495931. The next prime is 843495973. The reversal of 843495949 is 949594348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 843495849 + 100 = 29043^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 843495949 - 2¹¹ = 843493901 is a prime.

It is a super-2 number, since 2×843495949² = 1422970831958821202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 843495949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (843495929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421747974 + 421747975.

It is an arithmetic number, because the mean of its divisors is an integer number (421747975).

Almost surely, 2^843495949 is an apocalyptic number.

It is an amenable number.

843495949 is a deficient number, since it is larger than the sum of its proper divisors (1).

843495949 is an equidigital number, since it uses as much as digits as its factorization.

843495949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 55.

The square root of 843495949 is about 29043.0017215852. The cubic root of 843495949 is about 944.8459381371.

The spelling of 843495949 in words is "eight hundred forty-three million, four hundred ninety-five thousand, nine hundred forty-nine".