78814967 has 8 divisors (see below), whose sum is σ = 98262912. Its totient is φ = 61414200.

The previous prime is 78814937. The next prime is 78814979. The reversal of 78814967 is 76941887.

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

It is a cyclic number.

It is not a de Polignac number, because 78814967 - 2¹² = 78810871 is a prime.

It is a super-2 number, since 2×78814967² = 12423598046422178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78814937) 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 7 ways as a sum of consecutive naturals, for example, 511709 + ... + 511862.

It is an arithmetic number, because the mean of its divisors is an integer number (12282864).

Almost surely, 2^78814967 is an apocalyptic number.

78814967 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78814967 is a deficient number, since it is larger than the sum of its proper divisors (19447945).

78814967 is a wasteful number, since it uses less digits than its factorization.

78814967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023589.

The product of its digits is 677376, while the sum is 50.

The square root of 78814967 is about 8877.7793957723. The cubic root of 78814967 is about 428.7487820516.

Subtracting from 78814967 its reverse (76941887), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 78814967 in words is "seventy-eight million, eight hundred fourteen thousand, nine hundred sixty-seven".