78470117 has 4 divisors (see below), whose sum is σ = 85603776. Its totient is φ = 71336460.

The previous prime is 78470111. The next prime is 78470129. The reversal of 78470117 is 71107487.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71107487 = 11 ⋅6464317.

It is a cyclic number.

It is not a de Polignac number, because 78470117 - 2⁶ = 78470053 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 (78470111) 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, 3566813 + ... + 3566834.

It is an arithmetic number, because the mean of its divisors is an integer number (21400944).

Almost surely, 2^78470117 is an apocalyptic number.

It is an amenable number.

78470117 is a deficient number, since it is larger than the sum of its proper divisors (7133659).

78470117 is a wasteful number, since it uses less digits than its factorization.

78470117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7133658.

The product of its (nonzero) digits is 10976, while the sum is 35.

The square root of 78470117 is about 8858.3360175600. The cubic root of 78470117 is about 428.1225465752.

It can be divided in two parts, 78470 and 117, that added together give a palindrome (78587).

The spelling of 78470117 in words is "seventy-eight million, four hundred seventy thousand, one hundred seventeen".