917885783397 has 16 divisors (see below), whose sum is σ = 1393154707968. Its totient is φ = 532107700080.

The previous prime is 917885783383. The next prime is 917885783417. The reversal of 917885783397 is 793387588719.

917885783397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 917885783397 - 2¹¹ = 917885781349 is a prime.

It is a super-3 number, since 3×917885783397³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (917885783357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 604667083 + ... + 604668600.

It is an arithmetic number, because the mean of its divisors is an integer number (87072169248).

Almost surely, 2^917885783397 is an apocalyptic number.

It is an amenable number.

917885783397 is a deficient number, since it is larger than the sum of its proper divisors (475268924571).

917885783397 is a wasteful number, since it uses less digits than its factorization.

917885783397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209335720.

The product of its digits is 640120320, while the sum is 75.

The spelling of 917885783397 in words is "nine hundred seventeen billion, eight hundred eighty-five million, seven hundred eighty-three thousand, three hundred ninety-seven".