916669121 has 8 divisors (see below), whose sum is σ = 971243784. Its totient is φ = 862167040.

The previous prime is 916669111. The next prime is 916669157. The reversal of 916669121 is 121966619.

It can be written as a sum of positive squares in 4 ways, for example, as 108972721 + 807696400 = 10439^2 + 28420^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-916669121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (916669111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9041 + ... + 43761.

It is an arithmetic number, because the mean of its divisors is an integer number (121405473).

Almost surely, 2^916669121 is an apocalyptic number.

It is an amenable number.

916669121 is a deficient number, since it is larger than the sum of its proper divisors (54574663).

916669121 is a wasteful number, since it uses less digits than its factorization.

916669121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36291.

The product of its digits is 34992, while the sum is 41.

The square root of 916669121 is about 30276.5440729288. The cubic root of 916669121 is about 971.4136475123.

It can be divided in two parts, 9166 and 69121, that added together give a palindrome (78287).

The spelling of 916669121 in words is "nine hundred sixteen million, six hundred sixty-nine thousand, one hundred twenty-one".