78964667 has 4 divisors (see below), whose sum is σ = 79250016. Its totient is φ = 78679320.

The previous prime is 78964661. The next prime is 78964673. The reversal of 78964667 is 76646987.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (78964661) and next prime (78964673).

It is a cyclic number.

It is not a de Polignac number, because 78964667 - 2⁸ = 78964411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78964661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142259 + ... + 142812.

It is an arithmetic number, because the mean of its divisors is an integer number (19812504).

Almost surely, 2^78964667 is an apocalyptic number.

78964667 is a deficient number, since it is larger than the sum of its proper divisors (285349).

78964667 is a wasteful number, since it uses less digits than its factorization.

78964667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285348.

The product of its digits is 3048192, while the sum is 53.

The square root of 78964667 is about 8886.2065584815. The cubic root of 78964667 is about 429.0200634314.

It can be divided in two parts, 789 and 64667, that added together give a palindrome (65456).

The spelling of 78964667 in words is "seventy-eight million, nine hundred sixty-four thousand, six hundred sixty-seven".