78077087 has 8 divisors (see below), whose sum is σ = 85284480. Its totient is φ = 70887960.

The previous prime is 78077071. The next prime is 78077093.

78077087 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 78077087 - 2⁴ = 78077071 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 (78077287) 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, 5318 + ... + 13580.

It is an arithmetic number, because the mean of its divisors is an integer number (10660560).

Almost surely, 2^78077087 is an apocalyptic number.

78077087 is a deficient number, since it is larger than the sum of its proper divisors (7207393).

78077087 is a wasteful number, since it uses less digits than its factorization.

78077087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9133.

The product of its (nonzero) digits is 153664, while the sum is 44.

The square root of 78077087 is about 8836.1239805698. The cubic root of 78077087 is about 427.4065767149.

The spelling of 78077087 in words is "seventy-eight million, seventy-seven thousand, eighty-seven".