83991453 has 48 divisors (see below), whose sum is σ = 143982720. Its totient is φ = 42360192.

The previous prime is 83991437. The next prime is 83991461. The reversal of 83991453 is 35419938.

It is not a de Polignac number, because 83991453 - 2⁴ = 83991437 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83991433) 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 47 ways as a sum of consecutive naturals, for example, 815400 + ... + 815502.

It is an arithmetic number, because the mean of its divisors is an integer number (2999640).

Almost surely, 2^83991453 is an apocalyptic number.

It is an amenable number.

83991453 is a deficient number, since it is larger than the sum of its proper divisors (59991267).

83991453 is a wasteful number, since it uses less digits than its factorization.

83991453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 155 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 83991453 is about 9164.6851009732. The cubic root of 83991453 is about 437.9370596159.

The spelling of 83991453 in words is "eighty-three million, nine hundred ninety-one thousand, four hundred fifty-three".