843313949 has 2 divisors, whose sum is σ = 843313950. Its totient is φ = 843313948.

The previous prime is 843313927. The next prime is 843313967. The reversal of 843313949 is 949313348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 842740900 + 573049 = 29030^2 + 757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-843313949 is a prime.

It is a super-2 number, since 2×843313949² = 1422356833155949202, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (843313969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421656974 + 421656975.

It is an arithmetic number, because the mean of its divisors is an integer number (421656975).

Almost surely, 2^843313949 is an apocalyptic number.

It is an amenable number.

843313949 is a deficient number, since it is larger than the sum of its proper divisors (1).

843313949 is an equidigital number, since it uses as much as digits as its factorization.

843313949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 44.

The square root of 843313949 is about 29039.8682676076. The cubic root of 843313949 is about 944.7779771981. Note that the first 3 decimals are identical.

The spelling of 843313949 in words is "eight hundred forty-three million, three hundred thirteen thousand, nine hundred forty-nine".