87512193 has 6 divisors (see below), whose sum is σ = 126406514. Its totient is φ = 58341456.

The previous prime is 87512153. The next prime is 87512203. The reversal of 87512193 is 39121578.

It can be written as a sum of positive squares in only one way, i.e., 85599504 + 1912689 = 9252^2 + 1383^2 .

It is not a de Polignac number, because 87512193 - 2¹⁷ = 87381121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87512143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4861780 + ... + 4861797.

Almost surely, 2^87512193 is an apocalyptic number.

It is an amenable number.

87512193 is a deficient number, since it is larger than the sum of its proper divisors (38894321).

87512193 is a wasteful number, since it uses less digits than its factorization.

87512193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9723583 (or 9723580 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 87512193 is about 9354.7951874961. The cubic root of 87512193 is about 443.9726212726.

The spelling of 87512193 in words is "eighty-seven million, five hundred twelve thousand, one hundred ninety-three".