921901 has 2 divisors, whose sum is σ = 921902. Its totient is φ = 921900.

The previous prime is 921889. The next prime is 921911. The reversal of 921901 is 109129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697225 + 224676 = 835^2 + 474^2 .

It is a cyclic number.

It is not a de Polignac number, because 921901 - 2¹³ = 913709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460950 + 460951.

It is an arithmetic number, because the mean of its divisors is an integer number (460951).

2⁹²¹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

921901 is a deficient number, since it is larger than the sum of its proper divisors (1).

921901 is an equidigital number, since it uses as much as digits as its factorization.

921901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 921901 is about 960.1567580349. The cubic root of 921901 is about 97.3258253524.

The spelling of 921901 in words is "nine hundred twenty-one thousand, nine hundred one".