87881493 has 32 divisors (see below), whose sum is σ = 137687040. Its totient is φ = 48818880.

The previous prime is 87881489. The next prime is 87881501. The reversal of 87881493 is 39418878.

It is not a de Polignac number, because 87881493 - 2² = 87881489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87881693) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265338 + ... + 265668.

It is an arithmetic number, because the mean of its divisors is an integer number (4302720).

Almost surely, 2^87881493 is an apocalyptic number.

It is an amenable number.

87881493 is a deficient number, since it is larger than the sum of its proper divisors (49805547).

87881493 is a wasteful number, since it uses less digits than its factorization.

87881493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657.

The product of its digits is 387072, while the sum is 48.

The square root of 87881493 is about 9374.5129473483. The cubic root of 87881493 is about 444.5962638673.

The spelling of 87881493 in words is "eighty-seven million, eight hundred eighty-one thousand, four hundred ninety-three".