87127881 has 4 divisors (see below), whose sum is σ = 116170512. Its totient is φ = 58085252.

The previous prime is 87127871. The next prime is 87127903. The reversal of 87127881 is 18872178.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87127881 - 2¹⁷ = 86996809 is a prime.

It is a super-2 number, since 2×87127881² = 15182535295100322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87127871) 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, 14521311 + ... + 14521316.

It is an arithmetic number, because the mean of its divisors is an integer number (29042628).

Almost surely, 2^87127881 is an apocalyptic number.

It is an amenable number.

87127881 is a deficient number, since it is larger than the sum of its proper divisors (29042631).

87127881 is a wasteful number, since it uses less digits than its factorization.

87127881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29042630.

The product of its digits is 50176, while the sum is 42.

The square root of 87127881 is about 9334.2316770048. The cubic root of 87127881 is about 443.3217619357.

The spelling of 87127881 in words is "eighty-seven million, one hundred twenty-seven thousand, eight hundred eighty-one".