87898093 has 4 divisors (see below), whose sum is σ = 88150300. Its totient is φ = 87645888.

The previous prime is 87898021. The next prime is 87898099. The reversal of 87898093 is 39089878.

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 60419529 + 27478564 = 7773^2 + 5242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87898093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87898093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87898099) 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, 125580 + ... + 126277.

It is an arithmetic number, because the mean of its divisors is an integer number (22037575).

Almost surely, 2^87898093 is an apocalyptic number.

It is an amenable number.

87898093 is a deficient number, since it is larger than the sum of its proper divisors (252207).

87898093 is a wasteful number, since it uses less digits than its factorization.

87898093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252206.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 87898093 is about 9375.3982848730. The cubic root of 87898093 is about 444.6242554770.

The spelling of 87898093 in words is "eighty-seven million, eight hundred ninety-eight thousand, ninety-three".