83403889 has 4 divisors (see below), whose sum is σ = 83602420. Its totient is φ = 83205360.

The previous prime is 83403851. The next prime is 83403907. The reversal of 83403889 is 98830438.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5664400 + 77739489 = 2380^2 + 8817^2 .

It is a cyclic number.

It is not a de Polignac number, because 83403889 - 2²¹ = 81306737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83403839) 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, 98634 + ... + 99475.

It is an arithmetic number, because the mean of its divisors is an integer number (20900605).

Almost surely, 2^83403889 is an apocalyptic number.

It is an amenable number.

83403889 is a deficient number, since it is larger than the sum of its proper divisors (198531).

83403889 is a wasteful number, since it uses less digits than its factorization.

83403889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198530.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 83403889 is about 9132.5729671325. The cubic root of 83403889 is about 436.9134696985.

The spelling of 83403889 in words is "eighty-three million, four hundred three thousand, eight hundred eighty-nine".