916279985 has 4 divisors (see below), whose sum is σ = 1099535988. Its totient is φ = 733023984.

The previous prime is 916279967. The next prime is 916280021. The reversal of 916279985 is 589972619.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 182466064 + 733813921 = 13508^2 + 27089^2 .

It is a cyclic number.

It is not a de Polignac number, because 916279985 - 2²⁶ = 849171121 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 916279985.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91627994 + ... + 91628003.

It is an arithmetic number, because the mean of its divisors is an integer number (274883997).

Almost surely, 2^916279985 is an apocalyptic number.

It is an amenable number.

916279985 is a deficient number, since it is larger than the sum of its proper divisors (183256003).

916279985 is a wasteful number, since it uses less digits than its factorization.

916279985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183256002.

The product of its digits is 2449440, while the sum is 56.

The square root of 916279985 is about 30270.1170298365. The cubic root of 916279985 is about 971.2761695081.

The spelling of 916279985 in words is "nine hundred sixteen million, two hundred seventy-nine thousand, nine hundred eighty-five".