78873287 has 4 divisors (see below), whose sum is σ = 78963696. Its totient is φ = 78782880.

The previous prime is 78873281. The next prime is 78873329. The reversal of 78873287 is 78237887.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78873287 - 2¹² = 78869191 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 (78873281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43883 + ... + 45644.

It is an arithmetic number, because the mean of its divisors is an integer number (19740924).

Almost surely, 2^78873287 is an apocalyptic number.

78873287 is a deficient number, since it is larger than the sum of its proper divisors (90409).

78873287 is an equidigital number, since it uses as much as digits as its factorization.

78873287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90408.

The product of its digits is 1053696, while the sum is 50.

The square root of 78873287 is about 8881.0633935357. The cubic root of 78873287 is about 428.8545084340.

The spelling of 78873287 in words is "seventy-eight million, eight hundred seventy-three thousand, two hundred eighty-seven".