78788093 has 4 divisors (see below), whose sum is σ = 78971328. Its totient is φ = 78604860.

The previous prime is 78788089. The next prime is 78788113. The reversal of 78788093 is 39088787.

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 78788093 - 2² = 78788089 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 (78788893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90971 + ... + 91832.

It is an arithmetic number, because the mean of its divisors is an integer number (19742832).

Almost surely, 2^78788093 is an apocalyptic number.

It is an amenable number.

78788093 is a deficient number, since it is larger than the sum of its proper divisors (183235).

78788093 is a wasteful number, since it uses less digits than its factorization.

78788093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183234.

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

The square root of 78788093 is about 8876.2657125618. The cubic root of 78788093 is about 428.7000455191.

The spelling of 78788093 in words is "seventy-eight million, seven hundred eighty-eight thousand, ninety-three".