921073 has 2 divisors, whose sum is σ = 921074. Its totient is φ = 921072.

The previous prime is 921031. The next prime is 921079. The reversal of 921073 is 370129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 734449 + 186624 = 857^2 + 432^2 .

It is a cyclic number.

It is not a de Polignac number, because 921073 - 2⁹ = 920561 is a prime.

It is not a weakly prime, because it can be changed into another prime (921079) 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, 460536 + 460537.

It is an arithmetic number, because the mean of its divisors is an integer number (460537).

2⁹²¹⁰⁷³ is an apocalyptic number.

It is an amenable number.

921073 is a deficient number, since it is larger than the sum of its proper divisors (1).

921073 is an equidigital number, since it uses as much as digits as its factorization.

921073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 921073 is about 959.7254815831. The cubic root of 921073 is about 97.2966790842.

The spelling of 921073 in words is "nine hundred twenty-one thousand, seventy-three".