917979133 has 8 divisors (see below), whose sum is σ = 937543896. Its totient is φ = 898497600.

The previous prime is 917979103. The next prime is 917979169. The reversal of 917979133 is 331979719.

It can be written as a sum of positive squares in 4 ways, for example, as 30713764 + 887265369 = 5542^2 + 29787^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 917979133 - 2¹³ = 917970941 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 (917979103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1743 + ... + 42883.

It is an arithmetic number, because the mean of its divisors is an integer number (117192987).

Almost surely, 2^917979133 is an apocalyptic number.

It is an amenable number.

917979133 is a deficient number, since it is larger than the sum of its proper divisors (19564763).

917979133 is a wasteful number, since it uses less digits than its factorization.

917979133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41615.

The product of its digits is 321489, while the sum is 49.

The square root of 917979133 is about 30298.1704563163. The cubic root of 917979133 is about 971.8761763863.

The spelling of 917979133 in words is "nine hundred seventeen million, nine hundred seventy-nine thousand, one hundred thirty-three".