921836065 has 8 divisors (see below), whose sum is σ = 1111035240. Its totient is φ = 734247552.

The previous prime is 921836059. The next prime is 921836081. The reversal of 921836065 is 560638129.

It can be written as a sum of positive squares in 4 ways, for example, as 355586449 + 566249616 = 18857^2 + 23796^2 .

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-921836065 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401404 + ... + 403693.

It is an arithmetic number, because the mean of its divisors is an integer number (138879405).

Almost surely, 2^921836065 is an apocalyptic number.

It is an amenable number.

921836065 is a deficient number, since it is larger than the sum of its proper divisors (189199175).

921836065 is a wasteful number, since it uses less digits than its factorization.

921836065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805331.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 921836065 is about 30361.7533255245. The cubic root of 921836065 is about 973.2354021876.

The spelling of 921836065 in words is "nine hundred twenty-one million, eight hundred thirty-six thousand, sixty-five".