78735873 has 4 divisors (see below), whose sum is σ = 104981168. Its totient is φ = 52490580.

The previous prime is 78735869. The next prime is 78735883. The reversal of 78735873 is 37853787.

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 not a de Polignac number, because 78735873 - 2² = 78735869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78735803) 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, 13122643 + ... + 13122648.

It is an arithmetic number, because the mean of its divisors is an integer number (26245292).

Almost surely, 2^78735873 is an apocalyptic number.

It is an amenable number.

78735873 is a deficient number, since it is larger than the sum of its proper divisors (26245295).

78735873 is a wasteful number, since it uses less digits than its factorization.

78735873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26245294.

The product of its digits is 987840, while the sum is 48.

The square root of 78735873 is about 8873.3236726719. The cubic root of 78735873 is about 428.6053118132.

The spelling of 78735873 in words is "seventy-eight million, seven hundred thirty-five thousand, eight hundred seventy-three".