84117643 has 4 divisors (see below), whose sum is σ = 84260088. Its totient is φ = 83975200.

The previous prime is 84117641. The next prime is 84117659. The reversal of 84117643 is 34671148.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84117643 - 2¹ = 84117641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84117599 and 84117608.

It is not an unprimeable number, because it can be changed into a prime (84117641) 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, 70333 + ... + 71518.

It is an arithmetic number, because the mean of its divisors is an integer number (21065022).

Almost surely, 2^84117643 is an apocalyptic number.

84117643 is a deficient number, since it is larger than the sum of its proper divisors (142445).

84117643 is a wasteful number, since it uses less digits than its factorization.

84117643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142444.

The product of its digits is 16128, while the sum is 34.

The square root of 84117643 is about 9171.5670961946. The cubic root of 84117643 is about 438.1562709068.

The spelling of 84117643 in words is "eighty-four million, one hundred seventeen thousand, six hundred forty-three".