921320033 has 2 divisors, whose sum is σ = 921320034. Its totient is φ = 921320032.

The previous prime is 921320011. The next prime is 921320077. The reversal of 921320033 is 330023129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 481495249 + 439824784 = 21943^2 + 20972^2 .

It is an emirp because it is prime and its reverse (330023129) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 921320033 - 2¹² = 921315937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 921319990 and 921320008.

It is not a weakly prime, because it can be changed into another prime (921320233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460660016 + 460660017.

It is an arithmetic number, because the mean of its divisors is an integer number (460660017).

Almost surely, 2^921320033 is an apocalyptic number.

It is an amenable number.

921320033 is a deficient number, since it is larger than the sum of its proper divisors (1).

921320033 is an equidigital number, since it uses as much as digits as its factorization.

921320033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 921320033 is about 30353.2540759636. The cubic root of 921320033 is about 973.0537667278.

The spelling of 921320033 in words is "nine hundred twenty-one million, three hundred twenty thousand, thirty-three".