843351381 has 6 divisors (see below), whose sum is σ = 1218174230. Its totient is φ = 562234248.

The previous prime is 843351371. The next prime is 843351433. The reversal of 843351381 is 183153348.

It can be written as a sum of positive squares in only one way, i.e., 842973156 + 378225 = 29034^2 + 615^2 .

It is not a de Polignac number, because 843351381 - 2¹⁵ = 843318613 is a prime.

It is a super-2 number, since 2×843351381² = 1422483103669214322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (843351361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46852846 + ... + 46852863.

Almost surely, 2^843351381 is an apocalyptic number.

It is an amenable number.

843351381 is a deficient number, since it is larger than the sum of its proper divisors (374822849).

843351381 is a wasteful number, since it uses less digits than its factorization.

843351381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93705715 (or 93705712 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 843351381 is about 29040.5127537377. The cubic root of 843351381 is about 944.7919555455.

The spelling of 843351381 in words is "eight hundred forty-three million, three hundred fifty-one thousand, three hundred eighty-one".