84065623 has 4 divisors (see below), whose sum is σ = 84282120. Its totient is φ = 83849128.

The previous prime is 84065609. The next prime is 84065659. The reversal of 84065623 is 32656048.

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 84065623 - 2¹⁷ = 83934551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84065123) 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, 107665 + ... + 108442.

It is an arithmetic number, because the mean of its divisors is an integer number (21070530).

Almost surely, 2^84065623 is an apocalyptic number.

84065623 is a deficient number, since it is larger than the sum of its proper divisors (216497).

84065623 is a wasteful number, since it uses less digits than its factorization.

84065623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216496.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 84065623 is about 9168.7307191345. The cubic root of 84065623 is about 438.0659308048.

It can be divided in two parts, 84065 and 623, that multiplied together give a triangular number (52372495 = T₁₀₂₃₄).

The spelling of 84065623 in words is "eighty-four million, sixty-five thousand, six hundred twenty-three".