7912447717 has 4 divisors (see below), whose sum is σ = 8377885836. Its totient is φ = 7447009600.

The previous prime is 7912447687. The next prime is 7912447727. The reversal of 7912447717 is 7177442197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7177442197 = 149 ⋅48170753.

It can be written as a sum of positive squares in 2 ways, for example, as 7442685441 + 469762276 = 86271^2 + 21674^2 .

It is a cyclic number.

It is not a de Polignac number, because 7912447717 - 2²⁷ = 7778229989 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 (7912447727) 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, 232719034 + ... + 232719067.

It is an arithmetic number, because the mean of its divisors is an integer number (2094471459).

Almost surely, 2^7912447717 is an apocalyptic number.

It is an amenable number.

7912447717 is a deficient number, since it is larger than the sum of its proper divisors (465438119).

7912447717 is a wasteful number, since it uses less digits than its factorization.

7912447717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465438118.

The product of its digits is 691488, while the sum is 49.

The square root of 7912447717 is about 88951.9404903569. The cubic root of 7912447717 is about 1992.6771974207.

The spelling of 7912447717 in words is "seven billion, nine hundred twelve million, four hundred forty-seven thousand, seven hundred seventeen".