921300217 has 8 divisors (see below), whose sum is σ = 976316040. Its totient is φ = 867834240.

The previous prime is 921300199. The next prime is 921300221. The reversal of 921300217 is 712003129.

It can be written as a sum of positive squares in 4 ways, for example, as 169937296 + 751362921 = 13036^2 + 27411^2 .

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 921300217 - 2¹⁵ = 921267449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 921300191 and 921300200.

It is not an unprimeable number, because it can be changed into a prime (921300617) 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, 386238 + ... + 388615.

It is an arithmetic number, because the mean of its divisors is an integer number (122039505).

Almost surely, 2^921300217 is an apocalyptic number.

It is an amenable number.

921300217 is a deficient number, since it is larger than the sum of its proper divisors (55015823).

921300217 is a wasteful number, since it uses less digits than its factorization.

921300217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774923.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 921300217 is about 30352.9276512168. The cubic root of 921300217 is about 973.0467904434.

The spelling of 921300217 in words is "nine hundred twenty-one million, three hundred thousand, two hundred seventeen".