83521398 has 8 divisors (see below), whose sum is σ = 167042808. Its totient is φ = 27840464.

The previous prime is 83521381. The next prime is 83521433. The reversal of 83521398 is 89312538.

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

83521398 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6960111 + ... + 6960122.

It is an arithmetic number, because the mean of its divisors is an integer number (20880351).

Almost surely, 2^83521398 is an apocalyptic number.

83521398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83521398 is a wasteful number, since it uses less digits than its factorization.

83521398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13920238.

The product of its digits is 51840, while the sum is 39.

The square root of 83521398 is about 9139.0042127138. The cubic root of 83521398 is about 437.1185647388.

The spelling of 83521398 in words is "eighty-three million, five hundred twenty-one thousand, three hundred ninety-eight".