78055087 has 4 divisors (see below), whose sum is σ = 85151016. Its totient is φ = 70959160.

The previous prime is 78055073. The next prime is 78055093.

78055087 is nontrivially palindromic in base 10.

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 78055087 - 2²³ = 69666479 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78055487) 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, 3547948 + ... + 3547969.

It is an arithmetic number, because the mean of its divisors is an integer number (21287754).

Almost surely, 2^78055087 is an apocalyptic number.

78055087 is a deficient number, since it is larger than the sum of its proper divisors (7095929).

78055087 is a wasteful number, since it uses less digits than its factorization.

78055087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7095928.

The product of its (nonzero) digits is 78400, while the sum is 40.

The square root of 78055087 is about 8834.8790031330. The cubic root of 78055087 is about 427.3664290935.

The spelling of 78055087 in words is "seventy-eight million, fifty-five thousand, eighty-seven".