916279621 has 8 divisors (see below), whose sum is σ = 948238200. Its totient is φ = 884345280.

The previous prime is 916279619. The next prime is 916279633. The reversal of 916279621 is 126972619.

It is a happy number.

916279621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 548215396 + 368064225 = 23414^2 + 19185^2 .

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 916279621 - 2¹ = 916279619 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 (916279601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106675 + ... + 114943.

It is an arithmetic number, because the mean of its divisors is an integer number (118529775).

Almost surely, 2^916279621 is an apocalyptic number.

It is an amenable number.

916279621 is a deficient number, since it is larger than the sum of its proper divisors (31958579).

916279621 is a wasteful number, since it uses less digits than its factorization.

916279621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12119.

The product of its digits is 81648, while the sum is 43.

The square root of 916279621 is about 30270.1110173055. Note that the first 3 decimals coincide. The cubic root of 916279621 is about 971.2760408922.

The spelling of 916279621 in words is "nine hundred sixteen million, two hundred seventy-nine thousand, six hundred twenty-one".