921345736 has 16 divisors (see below), whose sum is σ = 1829142540. Its totient is φ = 433574400.

The previous prime is 921345721. The next prime is 921345773. The reversal of 921345736 is 637543129.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 880308900 + 41036836 = 29670^2 + 6406^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3387165 + ... + 3387436.

Almost surely, 2^921345736 is an apocalyptic number.

It is an amenable number.

921345736 is a deficient number, since it is larger than the sum of its proper divisors (907796804).

921345736 is a wasteful number, since it uses less digits than its factorization.

921345736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6774624 (or 6774620 counting only the distinct ones).

The product of its digits is 136080, while the sum is 40.

The square root of 921345736 is about 30353.6774707777. The cubic root of 921345736 is about 973.0628153998.

The spelling of 921345736 in words is "nine hundred twenty-one million, three hundred forty-five thousand, seven hundred thirty-six".