87390271 has 18 divisors (see below), whose sum is σ = 95611488. Its totient is φ = 79786080.

The previous prime is 87390227. The next prime is 87390287. The reversal of 87390271 is 17209378.

It is not a de Polignac number, because 87390271 - 2⁷ = 87390143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87390271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87390211) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1197091 + ... + 1197163.

Almost surely, 2^87390271 is an apocalyptic number.

87390271 is a deficient number, since it is larger than the sum of its proper divisors (8221217).

87390271 is an equidigital number, since it uses as much as digits as its factorization.

87390271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 87390271 is about 9348.2763651916. The cubic root of 87390271 is about 443.7663445411.

The spelling of 87390271 in words is "eighty-seven million, three hundred ninety thousand, two hundred seventy-one".