920641 has 2 divisors, whose sum is σ = 920642. Its totient is φ = 920640.

The previous prime is 920609. The next prime is 920651. The reversal of 920641 is 146029.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863041 + 57600 = 929^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 920641 - 2⁵ = 920609 is a prime.

It is the 960-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (920651) by changing a digit.

It is a nontrivial repunit in base 959.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460320 + 460321.

It is an arithmetic number, because the mean of its divisors is an integer number (460321).

2⁹²⁰⁶⁴¹ is an apocalyptic number.

It is an amenable number.

920641 is a deficient number, since it is larger than the sum of its proper divisors (1).

920641 is an equidigital number, since it uses as much as digits as its factorization.

920641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 920641 is about 959.5003908285. The cubic root of 920641 is about 97.2814654010.

The spelling of 920641 in words is "nine hundred twenty thousand, six hundred forty-one".