83521623 has 4 divisors (see below), whose sum is σ = 111362168. Its totient is φ = 55681080.

The previous prime is 83521621. The next prime is 83521637. The reversal of 83521623 is 32612538.

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

It is not a de Polignac number, because 83521623 - 2¹ = 83521621 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 (83521621) 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, 13920268 + ... + 13920273.

It is an arithmetic number, because the mean of its divisors is an integer number (27840542).

Almost surely, 2^83521623 is an apocalyptic number.

83521623 is a deficient number, since it is larger than the sum of its proper divisors (27840545).

83521623 is a wasteful number, since it uses less digits than its factorization.

83521623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27840544.

The product of its digits is 8640, while the sum is 30.

The square root of 83521623 is about 9139.0165225805. The cubic root of 83521623 is about 437.1189572593.

The spelling of 83521623 in words is "eighty-three million, five hundred twenty-one thousand, six hundred twenty-three".