78318967 has 4 divisors (see below), whose sum is σ = 79985376. Its totient is φ = 76652560.

The previous prime is 78318923. The next prime is 78318997. The reversal of 78318967 is 76981387.

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 78318967 - 2⁷ = 78318839 is a prime.

It is a super-2 number, since 2×78318967² = 12267721183894178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78318967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78318907) 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, 833134 + ... + 833227.

It is an arithmetic number, because the mean of its divisors is an integer number (19996344).

Almost surely, 2^78318967 is an apocalyptic number.

78318967 is a deficient number, since it is larger than the sum of its proper divisors (1666409).

78318967 is a wasteful number, since it uses less digits than its factorization.

78318967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666408.

The product of its digits is 508032, while the sum is 49.

The square root of 78318967 is about 8849.8003932292. The cubic root of 78318967 is about 427.8474851091.

The spelling of 78318967 in words is "seventy-eight million, three hundred eighteen thousand, nine hundred sixty-seven".