87381527 has 4 divisors (see below), whose sum is σ = 87570720. Its totient is φ = 87192336.

The previous prime is 87381499. The next prime is 87381533. The reversal of 87381527 is 72518378.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72518378 = 2 ⋅36259189.

It is a cyclic number.

It is not a de Polignac number, because 87381527 - 2¹⁴ = 87365143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87381587) 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, 93902 + ... + 94827.

It is an arithmetic number, because the mean of its divisors is an integer number (21892680).

Almost surely, 2^87381527 is an apocalyptic number.

87381527 is a deficient number, since it is larger than the sum of its proper divisors (189193).

87381527 is a wasteful number, since it uses less digits than its factorization.

87381527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189192.

The product of its digits is 94080, while the sum is 41.

The square root of 87381527 is about 9347.8086736946. The cubic root of 87381527 is about 443.7515434186.

The spelling of 87381527 in words is "eighty-seven million, three hundred eighty-one thousand, five hundred twenty-seven".