78057793 has 4 divisors (see below), whose sum is σ = 85153968. Its totient is φ = 70961620.

The previous prime is 78057787. The next prime is 78057797. The reversal of 78057793 is 39775087.

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 78057793 - 2⁹ = 78057281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78057797) 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, 3548071 + ... + 3548092.

It is an arithmetic number, because the mean of its divisors is an integer number (21288492).

Almost surely, 2^78057793 is an apocalyptic number.

It is an amenable number.

78057793 is a deficient number, since it is larger than the sum of its proper divisors (7096175).

78057793 is a wasteful number, since it uses less digits than its factorization.

78057793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7096174.

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 78057793 is about 8835.0321448198. The cubic root of 78057793 is about 427.3713676578.

The spelling of 78057793 in words is "seventy-eight million, fifty-seven thousand, seven hundred ninety-three".