83708821 has 8 divisors (see below), whose sum is σ = 96596864. Its totient is φ = 71053200.

The previous prime is 83708809. The next prime is 83708827. The reversal of 83708821 is 12880738.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83708821 - 2¹³ = 83700629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83708827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57330 + ... + 58771.

It is an arithmetic number, because the mean of its divisors is an integer number (12074608).

Almost surely, 2^83708821 is an apocalyptic number.

It is an amenable number.

83708821 is a deficient number, since it is larger than the sum of its proper divisors (12888043).

83708821 is a wasteful number, since it uses less digits than its factorization.

83708821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116211.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 83708821 is about 9149.2524831267. The cubic root of 83708821 is about 437.4452868722.

The spelling of 83708821 in words is "eighty-three million, seven hundred eight thousand, eight hundred twenty-one".