887141991 has 16 divisors (see below), whose sum is σ = 1253454048. Its totient is φ = 556185600.

The previous prime is 887141989. The next prime is 887142013. The reversal of 887141991 is 199141788.

It is not a de Polignac number, because 887141991 - 2¹ = 887141989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 887141991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (887141791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63021 + ... + 75801.

It is an arithmetic number, because the mean of its divisors is an integer number (78340878).

Almost surely, 2^887141991 is an apocalyptic number.

887141991 is a deficient number, since it is larger than the sum of its proper divisors (366312057).

887141991 is a wasteful number, since it uses less digits than its factorization.

887141991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14162.

The product of its digits is 145152, while the sum is 48.

The square root of 887141991 is about 29784.9289238702. The cubic root of 887141991 is about 960.8694347881.

The spelling of 887141991 in words is "eight hundred eighty-seven million, one hundred forty-one thousand, nine hundred ninety-one".