83888643 has 4 divisors (see below), whose sum is σ = 111851528. Its totient is φ = 55925760.

The previous prime is 83888617. The next prime is 83888647. The reversal of 83888643 is 34688838.

It is a happy number.

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

It is not a de Polignac number, because 83888643 - 2⁶ = 83888579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83888592 and 83888601.

It is not an unprimeable number, because it can be changed into a prime (83888647) 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, 13981438 + ... + 13981443.

It is an arithmetic number, because the mean of its divisors is an integer number (27962882).

Almost surely, 2^83888643 is an apocalyptic number.

83888643 is a deficient number, since it is larger than the sum of its proper divisors (27962885).

83888643 is a wasteful number, since it uses less digits than its factorization.

83888643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27962884.

The product of its digits is 884736, while the sum is 48.

The square root of 83888643 is about 9159.0743527935. The cubic root of 83888643 is about 437.7583005846.

The spelling of 83888643 in words is "eighty-three million, eight hundred eighty-eight thousand, six hundred forty-three".