78797389 has 8 divisors (see below), whose sum is σ = 90485280. Its totient is φ = 67863600.

The previous prime is 78797357. The next prime is 78797393. The reversal of 78797389 is 98379787.

It is a happy number.

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 78797389 - 2⁵ = 78797357 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 (78797339) 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 7 ways as a sum of consecutive naturals, for example, 188302 + ... + 188719.

It is an arithmetic number, because the mean of its divisors is an integer number (11310660).

Almost surely, 2^78797389 is an apocalyptic number.

It is an amenable number.

78797389 is a deficient number, since it is larger than the sum of its proper divisors (11687891).

78797389 is a wasteful number, since it uses less digits than its factorization.

78797389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377051.

The product of its digits is 5334336, while the sum is 58.

The square root of 78797389 is about 8876.7893407470. The cubic root of 78797389 is about 428.7169052532.

The spelling of 78797389 in words is "seventy-eight million, seven hundred ninety-seven thousand, three hundred eighty-nine".