83708789 has 4 divisors (see below), whose sum is σ = 84242124. Its totient is φ = 83175456.

The previous prime is 83708771. The next prime is 83708791. The reversal of 83708789 is 98780738.

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 38254225 + 45454564 = 6185^2 + 6742^2 .

It is a cyclic number.

It is not a de Polignac number, because 83708789 - 2⁸ = 83708533 is a prime.

It is a super-2 number, since 2×83708789² = 14014322711693042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83708749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266432 + ... + 266745.

It is an arithmetic number, because the mean of its divisors is an integer number (21060531).

Almost surely, 2^83708789 is an apocalyptic number.

It is an amenable number.

83708789 is a deficient number, since it is larger than the sum of its proper divisors (533335).

83708789 is a wasteful number, since it uses less digits than its factorization.

83708789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533334.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 83708789 is about 9149.2507343498. The cubic root of 83708789 is about 437.4452311304.

The spelling of 83708789 in words is "eighty-three million, seven hundred eight thousand, seven hundred eighty-nine".