938921 has 2 divisors, whose sum is σ = 938922. Its totient is φ = 938920.

The previous prime is 938881. The next prime is 938939. The reversal of 938921 is 129839.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 912025 + 26896 = 955^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 938921 - 2⁶ = 938857 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 938921.

It is not a weakly prime, because it can be changed into another prime (938981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469460 + 469461.

It is an arithmetic number, because the mean of its divisors is an integer number (469461).

2⁹³⁸⁹²¹ is an apocalyptic number.

It is an amenable number.

938921 is a deficient number, since it is larger than the sum of its proper divisors (1).

938921 is an equidigital number, since it uses as much as digits as its factorization.

938921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 938921 is about 968.9793599453. The cubic root of 938921 is about 97.9211151945.

The spelling of 938921 in words is "nine hundred thirty-eight thousand, nine hundred twenty-one".