78482987 has 4 divisors (see below), whose sum is σ = 85617816. Its totient is φ = 71348160.

The previous prime is 78482951. The next prime is 78482993. The reversal of 78482987 is 78928487.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78928487 = 11 ⋅7175317.

It is a cyclic number.

It is not a de Polignac number, because 78482987 - 2¹² = 78478891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78482087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3567398 + ... + 3567419.

It is an arithmetic number, because the mean of its divisors is an integer number (21404454).

Almost surely, 2^78482987 is an apocalyptic number.

78482987 is a deficient number, since it is larger than the sum of its proper divisors (7134829).

78482987 is a wasteful number, since it uses less digits than its factorization.

78482987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7134828.

The product of its digits is 1806336, while the sum is 53.

The square root of 78482987 is about 8859.0624221754. The cubic root of 78482987 is about 428.1459509665.

The spelling of 78482987 in words is "seventy-eight million, four hundred eighty-two thousand, nine hundred eighty-seven".