87978727 has 8 divisors (see below), whose sum is σ = 89500032. Its totient is φ = 86465400.

The previous prime is 87978701. The next prime is 87978733. The reversal of 87978727 is 72787978.

It is a happy number.

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 87978727 - 2⁷ = 87978599 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 (87978767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22852 + ... + 26422.

It is an arithmetic number, because the mean of its divisors is an integer number (11187504).

Almost surely, 2^87978727 is an apocalyptic number.

87978727 is a deficient number, since it is larger than the sum of its proper divisors (1521305).

87978727 is a wasteful number, since it uses less digits than its factorization.

87978727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989.

The product of its digits is 2765952, while the sum is 55.

The square root of 87978727 is about 9379.6975964047. The cubic root of 87978727 is about 444.7601737644.

The spelling of 87978727 in words is "eighty-seven million, nine hundred seventy-eight thousand, seven hundred twenty-seven".