917229513841 has 3 divisors (see below), whose sum is σ = 917230471563. Its totient is φ = 917228556120.

The previous prime is 917229513799. The next prime is 917229513847. The reversal of 917229513841 is 148315922719.

The square root of 917229513841 is 957721.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 148315922719 = 599 ⋅247605881.

It can be written as a sum of positive squares in only one way, i.e., 15793200241 + 901436313600 = 125671^2 + 949440^2 .

It is not a de Polignac number, because 917229513841 - 2¹³ = 917229505649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (917229513847) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 478861 + ... + 1436581.

It is an arithmetic number, because the mean of its divisors is an integer number (305743490521).

Almost surely, 2^917229513841 is an apocalyptic number.

917229513841 is the 957721-st square number.

917229513841 is the 478861-st centered octagonal number.

It is an amenable number.

917229513841 is a deficient number, since it is larger than the sum of its proper divisors (957722).

917229513841 is an frugal number, since it uses more digits than its factorization.

917229513841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915442 (or 957721 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 52.

The spelling of 917229513841 in words is "nine hundred seventeen billion, two hundred twenty-nine million, five hundred thirteen thousand, eight hundred forty-one".