943814381 has 4 divisors (see below), whose sum is σ = 999332892. Its totient is φ = 888295872.

The previous prime is 943814363. The next prime is 943814401. The reversal of 943814381 is 183418349.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 768675625 + 175138756 = 27725^2 + 13234^2 .

It is a cyclic number.

It is not a de Polignac number, because 943814381 - 2¹⁴ = 943797997 is a prime.

It is a super-2 number, since 2×943814381² = 1781571171564826322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (943814351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27759230 + ... + 27759263.

It is an arithmetic number, because the mean of its divisors is an integer number (249833223).

Almost surely, 2^943814381 is an apocalyptic number.

It is an amenable number.

943814381 is a deficient number, since it is larger than the sum of its proper divisors (55518511).

943814381 is a wasteful number, since it uses less digits than its factorization.

943814381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55518510.

The product of its digits is 82944, while the sum is 41.

The square root of 943814381 is about 30721.5621510365. The cubic root of 943814381 is about 980.9093257118.

The spelling of 943814381 in words is "nine hundred forty-three million, eight hundred fourteen thousand, three hundred eighty-one".