920999 has 2 divisors, whose sum is σ = 921000. Its totient is φ = 920998.

The previous prime is 920971. The next prime is 921001. The reversal of 920999 is 999029.

It is a strong prime.

It is an emirp because it is prime and its reverse (999029) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 920999 - 2⁸ = 920743 is a prime.

Together with 921001, it forms a pair of twin primes.

It is a Chen prime.

920999 is a modest number, since divided by 999 gives 920 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (920399) 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, 460499 + 460500.

It is an arithmetic number, because the mean of its divisors is an integer number (460500).

2⁹²⁰⁹⁹⁹ is an apocalyptic number.

920999 is a deficient number, since it is larger than the sum of its proper divisors (1).

920999 is an equidigital number, since it uses as much as digits as its factorization.

920999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 920999 is about 959.6869281177. The cubic root of 920999 is about 97.2940733743.

The spelling of 920999 in words is "nine hundred twenty thousand, nine hundred ninety-nine".