87278999 has 8 divisors (see below), whose sum is σ = 88060560. Its totient is φ = 86501376.

The previous prime is 87278993. The next prime is 87279011. The reversal of 87278999 is 99987278.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87278999 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 (87278993) 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, 58112 + ... + 59594.

It is an arithmetic number, because the mean of its divisors is an integer number (11007570).

Almost surely, 2^87278999 is an apocalyptic number.

87278999 is a deficient number, since it is larger than the sum of its proper divisors (781561).

87278999 is a wasteful number, since it uses less digits than its factorization.

87278999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969.

The product of its digits is 4572288, while the sum is 59.

The square root of 87278999 is about 9342.3229980557. The cubic root of 87278999 is about 443.5779187565.

The spelling of 87278999 in words is "eighty-seven million, two hundred seventy-eight thousand, nine hundred ninety-nine".