83723643 has 6 divisors (see below), whose sum is σ = 120934164. Its totient is φ = 55815756.

The previous prime is 83723639. The next prime is 83723687. The reversal of 83723643 is 34632738.

83723643 is a `hidden beast` number, since 8 + 3 + 7 + 2 + 3 + 643 = 666.

It is not a de Polignac number, because 83723643 - 2² = 83723639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83723598 and 83723607.

It is not an unprimeable number, because it can be changed into a prime (83723603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4651305 + ... + 4651322.

It is an arithmetic number, because the mean of its divisors is an integer number (20155694).

Almost surely, 2^83723643 is an apocalyptic number.

83723643 is a deficient number, since it is larger than the sum of its proper divisors (37210521).

83723643 is a wasteful number, since it uses less digits than its factorization.

83723643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9302633 (or 9302630 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 83723643 is about 9150.0624588032. The cubic root of 83723643 is about 437.4711042684.

The spelling of 83723643 in words is "eighty-three million, seven hundred twenty-three thousand, six hundred forty-three".