87271869 has 4 divisors (see below), whose sum is σ = 116362496. Its totient is φ = 58181244.

The previous prime is 87271859. The next prime is 87271871. The reversal of 87271869 is 96817278.

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 not a de Polignac number, because 87271869 - 2⁹ = 87271357 is a prime.

It is a super-2 number, since 2×87271869² = 15232758237506322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87271859) 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, 14545309 + ... + 14545314.

It is an arithmetic number, because the mean of its divisors is an integer number (29090624).

Almost surely, 2^87271869 is an apocalyptic number.

It is an amenable number.

87271869 is a deficient number, since it is larger than the sum of its proper divisors (29090627).

87271869 is a wasteful number, since it uses less digits than its factorization.

87271869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29090626.

The product of its digits is 338688, while the sum is 48.

The square root of 87271869 is about 9341.9413935220. The cubic root of 87271869 is about 443.5658394984.

The spelling of 87271869 in words is "eighty-seven million, two hundred seventy-one thousand, eight hundred sixty-nine".