78809107 has 8 divisors (see below), whose sum is σ = 85022784. Its totient is φ = 72617088.

The previous prime is 78809051. The next prime is 78809123. The reversal of 78809107 is 70190887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78809107 is a prime.

It is a super-2 number, since 2×78809107² = 12421750692274898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78809107.

It is not an unprimeable number, because it can be changed into a prime (78809167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2598 + ... + 12820.

It is an arithmetic number, because the mean of its divisors is an integer number (10627848).

Almost surely, 2^78809107 is an apocalyptic number.

78809107 is a deficient number, since it is larger than the sum of its proper divisors (6213677).

78809107 is a wasteful number, since it uses less digits than its factorization.

78809107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10829.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 78809107 is about 8877.4493521507. The cubic root of 78809107 is about 428.7381557699.

The spelling of 78809107 in words is "seventy-eight million, eight hundred nine thousand, one hundred seven".