78804361 has 4 divisors (see below), whose sum is σ = 79095424. Its totient is φ = 78513300.

The previous prime is 78804347. The next prime is 78804377. The reversal of 78804361 is 16340887.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78804361 - 2⁵ = 78804329 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 78804361.

It is not an unprimeable number, because it can be changed into a prime (78804301) 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, 145125 + ... + 145666.

It is an arithmetic number, because the mean of its divisors is an integer number (19773856).

Almost surely, 2^78804361 is an apocalyptic number.

It is an amenable number.

78804361 is a deficient number, since it is larger than the sum of its proper divisors (291063).

78804361 is a wasteful number, since it uses less digits than its factorization.

78804361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291062.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 78804361 is about 8877.1820416166. The cubic root of 78804361 is about 428.7295491836.

The spelling of 78804361 in words is "seventy-eight million, eight hundred four thousand, three hundred sixty-one".