87981135 has 16 divisors (see below), whose sum is σ = 153567360. Its totient is φ = 42657440.

The previous prime is 87981119. The next prime is 87981143. The reversal of 87981135 is 53118978.

It is not a de Polignac number, because 87981135 - 2⁴ = 87981119 is a prime.

It is a super-3 number, since 3×87981135³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266445 + ... + 266774.

It is an arithmetic number, because the mean of its divisors is an integer number (9597960).

Almost surely, 2^87981135 is an apocalyptic number.

87981135 is a deficient number, since it is larger than the sum of its proper divisors (65586225).

87981135 is a wasteful number, since it uses less digits than its factorization.

87981135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533238.

The product of its digits is 60480, while the sum is 42.

The square root of 87981135 is about 9379.8259578736. The cubic root of 87981135 is about 444.7642314602.

The spelling of 87981135 in words is "eighty-seven million, nine hundred eighty-one thousand, one hundred thirty-five".