87381387 has 12 divisors (see below), whose sum is σ = 126477000. Its totient is φ = 58134528.

The previous prime is 87381353. The next prime is 87381401. The reversal of 87381387 is 78318378.

It is not a de Polignac number, because 87381387 - 2²³ = 78992779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87381317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5238 + ... + 14219.

It is an arithmetic number, because the mean of its divisors is an integer number (10539750).

Almost surely, 2^87381387 is an apocalyptic number.

87381387 is a deficient number, since it is larger than the sum of its proper divisors (39095613).

87381387 is a wasteful number, since it uses less digits than its factorization.

87381387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19962 (or 19959 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 87381387 is about 9347.8011853056. The cubic root of 87381387 is about 443.7513064301.

The spelling of 87381387 in words is "eighty-seven million, three hundred eighty-one thousand, three hundred eighty-seven".