1445917117 has 4 divisors (see below), whose sum is σ = 1484995996. Its totient is φ = 1406838240.

The previous prime is 1445917087. The next prime is 1445917127. The reversal of 1445917117 is 7117195441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7117195441 = 907 ⋅7846963.

It can be written as a sum of positive squares in 2 ways, for example, as 680896836 + 765020281 = 26094^2 + 27659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445917117 - 2¹¹ = 1445915069 is a prime.

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 1445917117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445917127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19539384 + ... + 19539457.

It is an arithmetic number, because the mean of its divisors is an integer number (371248999).

Almost surely, 2^1445917117 is an apocalyptic number.

It is an amenable number.

1445917117 is a deficient number, since it is larger than the sum of its proper divisors (39078879).

1445917117 is an equidigital number, since it uses as much as digits as its factorization.

1445917117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39078878.

The product of its digits is 35280, while the sum is 40.

The square root of 1445917117 is about 38025.2168567123. The cubic root of 1445917117 is about 1130.7878487792.

The spelling of 1445917117 in words is "one billion, four hundred forty-five million, nine hundred seventeen thousand, one hundred seventeen".