83819389 has 4 divisors (see below), whose sum is σ = 84105756. Its totient is φ = 83533024.

The previous prime is 83819387. The next prime is 83819419. The reversal of 83819389 is 98391838.

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 75116889 + 8702500 = 8667^2 + 2950^2 .

It is a cyclic number.

It is not a de Polignac number, because 83819389 - 2¹ = 83819387 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 (83819387) 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, 142744 + ... + 143329.

It is an arithmetic number, because the mean of its divisors is an integer number (21026439).

Almost surely, 2^83819389 is an apocalyptic number.

It is an amenable number.

83819389 is a deficient number, since it is larger than the sum of its proper divisors (286367).

83819389 is a wasteful number, since it uses less digits than its factorization.

83819389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286366.

The product of its digits is 373248, while the sum is 49.

The square root of 83819389 is about 9155.2929499825. The cubic root of 83819389 is about 437.6378041000.

The spelling of 83819389 in words is "eighty-three million, eight hundred nineteen thousand, three hundred eighty-nine".