87982193 has 8 divisors (see below), whose sum is σ = 94916136. Its totient is φ = 81072000.

The previous prime is 87982159. The next prime is 87982229. The reversal of 87982193 is 39128978.

It can be written as a sum of positive squares in 4 ways, for example, as 39150049 + 48832144 = 6257^2 + 6988^2 .

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 87982193 - 2¹² = 87978097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87982133) 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, 2183 + ... + 13443.

It is an arithmetic number, because the mean of its divisors is an integer number (11864517).

Almost surely, 2^87982193 is an apocalyptic number.

It is an amenable number.

87982193 is a deficient number, since it is larger than the sum of its proper divisors (6933943).

87982193 is a wasteful number, since it uses less digits than its factorization.

87982193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11875.

The product of its digits is 217728, while the sum is 47.

The square root of 87982193 is about 9379.8823553390. The cubic root of 87982193 is about 444.7660142616.

The spelling of 87982193 in words is "eighty-seven million, nine hundred eighty-two thousand, one hundred ninety-three".