933428921 has 2 divisors, whose sum is σ = 933428922. Its totient is φ = 933428920.

The previous prime is 933428917. The next prime is 933428981. The reversal of 933428921 is 129824339.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 482461225 + 450967696 = 21965^2 + 21236^2 .

It is an emirp because it is prime and its reverse (129824339) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 933428921 - 2² = 933428917 is a prime.

It is not a weakly prime, because it can be changed into another prime (933428981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 466714460 + 466714461.

It is an arithmetic number, because the mean of its divisors is an integer number (466714461).

Almost surely, 2^933428921 is an apocalyptic number.

It is an amenable number.

933428921 is a deficient number, since it is larger than the sum of its proper divisors (1).

933428921 is an equidigital number, since it uses as much as digits as its factorization.

933428921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 933428921 is about 30552.0690134073. The cubic root of 933428921 is about 977.2981670880.

The spelling of 933428921 in words is "nine hundred thirty-three million, four hundred twenty-eight thousand, nine hundred twenty-one".