78044797 has 4 divisors (see below), whose sum is σ = 78075900. Its totient is φ = 78013696.

The previous prime is 78044783. The next prime is 78044801. The reversal of 78044797 is 79744087.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36132121 + 41912676 = 6011^2 + 6474^2 .

It is a cyclic number.

It is not a de Polignac number, because 78044797 - 2¹⁵ = 78012029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78044737) 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, 11422 + ... + 16927.

It is an arithmetic number, because the mean of its divisors is an integer number (19518975).

Almost surely, 2^78044797 is an apocalyptic number.

It is an amenable number.

78044797 is a deficient number, since it is larger than the sum of its proper divisors (31103).

78044797 is a wasteful number, since it uses less digits than its factorization.

78044797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31102.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 78044797 is about 8834.2966330093. The cubic root of 78044797 is about 427.3476483666.

The spelling of 78044797 in words is "seventy-eight million, forty-four thousand, seven hundred ninety-seven".