87978271 has 8 divisors (see below), whose sum is σ = 89261120. Its totient is φ = 86699808.

The previous prime is 87978269. The next prime is 87978277. The reversal of 87978271 is 17287978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87978271 - 2¹ = 87978269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87978277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78205 + ... + 79321.

It is an arithmetic number, because the mean of its divisors is an integer number (11157640).

Almost surely, 2^87978271 is an apocalyptic number.

87978271 is a deficient number, since it is larger than the sum of its proper divisors (1282849).

87978271 is a wasteful number, since it uses less digits than its factorization.

87978271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193.

The product of its digits is 395136, while the sum is 49.

The square root of 87978271 is about 9379.6732885533. The cubic root of 87978271 is about 444.7594053552.

The spelling of 87978271 in words is "eighty-seven million, nine hundred seventy-eight thousand, two hundred seventy-one".