78676867 has 4 divisors (see below), whose sum is σ = 83304936. Its totient is φ = 74048800.

The previous prime is 78676861. The next prime is 78676921. The reversal of 78676867 is 76867687.

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: 76867687 = 13 ⋅5912899.

It is a cyclic number.

It is not a de Polignac number, because 78676867 - 2¹¹ = 78674819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78676861) 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, 2314009 + ... + 2314042.

It is an arithmetic number, because the mean of its divisors is an integer number (20826234).

Almost surely, 2^78676867 is an apocalyptic number.

78676867 is a deficient number, since it is larger than the sum of its proper divisors (4628069).

78676867 is a wasteful number, since it uses less digits than its factorization.

78676867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628068.

The product of its digits is 4741632, while the sum is 55.

The square root of 78676867 is about 8869.9981397969. The cubic root of 78676867 is about 428.4982170233.

The spelling of 78676867 in words is "seventy-eight million, six hundred seventy-six thousand, eight hundred sixty-seven".