83998561 has 8 divisors (see below), whose sum is σ = 87507200. Its totient is φ = 80539920.

The previous prime is 83998543. The next prime is 83998583. The reversal of 83998561 is 16589938.

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 83998561 - 2⁷ = 83998433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83998591) 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, 9051 + ... + 15808.

It is an arithmetic number, because the mean of its divisors is an integer number (10938400).

Almost surely, 2^83998561 is an apocalyptic number.

It is an amenable number.

83998561 is a deficient number, since it is larger than the sum of its proper divisors (3508639).

83998561 is a wasteful number, since it uses less digits than its factorization.

83998561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24999.

The product of its digits is 466560, while the sum is 49.

The square root of 83998561 is about 9165.0728856895. The cubic root of 83998561 is about 437.9494131300.

The spelling of 83998561 in words is "eighty-three million, nine hundred ninety-eight thousand, five hundred sixty-one".