87187201 has 4 divisors (see below), whose sum is σ = 87772500. Its totient is φ = 86601904.

The previous prime is 87187147. The next prime is 87187231. The reversal of 87187201 is 10278178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10278178 = 2 ⋅5139089.

It can be written as a sum of positive squares in 2 ways, for example, as 46240000 + 40947201 = 6800^2 + 6399^2 .

It is a cyclic number.

It is not a de Polignac number, because 87187201 - 2¹⁷ = 87056129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87187231) 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, 292426 + ... + 292723.

It is an arithmetic number, because the mean of its divisors is an integer number (21943125).

Almost surely, 2^87187201 is an apocalyptic number.

It is an amenable number.

87187201 is a deficient number, since it is larger than the sum of its proper divisors (585299).

87187201 is a wasteful number, since it uses less digits than its factorization.

87187201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585298.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 87187201 is about 9337.4086876392. The cubic root of 87187201 is about 443.4223492589.

The spelling of 87187201 in words is "eighty-seven million, one hundred eighty-seven thousand, two hundred one".