83533987 has 4 divisors (see below), whose sum is σ = 83560896. Its totient is φ = 83507080.

The previous prime is 83533981. The next prime is 83533991. The reversal of 83533987 is 78933538.

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 83533987 - 2¹⁹ = 83009699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83533981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8083 + ... + 15244.

It is an arithmetic number, because the mean of its divisors is an integer number (20890224).

Almost surely, 2^83533987 is an apocalyptic number.

83533987 is a deficient number, since it is larger than the sum of its proper divisors (26909).

83533987 is a wasteful number, since it uses less digits than its factorization.

83533987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26908.

The product of its digits is 544320, while the sum is 46.

The square root of 83533987 is about 9139.6929379493. The cubic root of 83533987 is about 437.1405256147.

The spelling of 83533987 in words is "eighty-three million, five hundred thirty-three thousand, nine hundred eighty-seven".