77678323 has 4 divisors (see below), whose sum is σ = 77967360. Its totient is φ = 77389288.

The previous prime is 77678317. The next prime is 77678329. The reversal of 77678323 is 32387677.

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 (77678317) and next prime (77678329).

It is a cyclic number.

It is not a de Polignac number, because 77678323 - 2²¹ = 75581171 is a prime.

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 77678323.

It is not an unprimeable number, because it can be changed into a prime (77678329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144115 + ... + 144652.

It is an arithmetic number, because the mean of its divisors is an integer number (19491840).

Almost surely, 2^77678323 is an apocalyptic number.

77678323 is a deficient number, since it is larger than the sum of its proper divisors (289037).

77678323 is a wasteful number, since it uses less digits than its factorization.

77678323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289036.

The product of its digits is 296352, while the sum is 43.

The square root of 77678323 is about 8813.5306773166. The cubic root of 77678323 is about 426.6777016053.

The spelling of 77678323 in words is "seventy-seven million, six hundred seventy-eight thousand, three hundred twenty-three".