83381643 has 10 divisors (see below), whose sum is σ = 124557884. Its totient is φ = 55587708.

The previous prime is 83381611. The next prime is 83381653. The reversal of 83381643 is 34618338.

It is a happy number.

83381643 is a `hidden beast` number, since 8 + 3 + 3 + 8 + 1 + 643 = 666.

It is not a de Polignac number, because 83381643 - 2⁵ = 83381611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83381598 and 83381607.

It is not an unprimeable number, because it can be changed into a prime (83381653) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 514621 + ... + 514782.

Almost surely, 2^83381643 is an apocalyptic number.

83381643 is a deficient number, since it is larger than the sum of its proper divisors (41176241).

83381643 is a wasteful number, since it uses less digits than its factorization.

83381643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029415 (or 1029406 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 83381643 is about 9131.3549377954. The cubic root of 83381643 is about 436.8746208253.

The spelling of 83381643 in words is "eighty-three million, three hundred eighty-one thousand, six hundred forty-three".