78750789 has 12 divisors (see below), whose sum is σ = 113700096. Its totient is φ = 48461712.

The previous prime is 78750787. The next prime is 78750797. The reversal of 78750789 is 98705787.

It is not a de Polignac number, because 78750789 - 2¹ = 78750787 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78750787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77157 + ... + 78170.

It is an arithmetic number, because the mean of its divisors is an integer number (9475008).

Almost surely, 2^78750789 is an apocalyptic number.

It is an amenable number.

78750789 is a deficient number, since it is larger than the sum of its proper divisors (34949307).

78750789 is a wasteful number, since it uses less digits than its factorization.

78750789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155356 (or 155343 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 51.

The square root of 78750789 is about 8874.1641296519. The cubic root of 78750789 is about 428.6323756022.

The spelling of 78750789 in words is "seventy-eight million, seven hundred fifty thousand, seven hundred eighty-nine".