1320923 has 2 divisors, whose sum is σ = 1320924. Its totient is φ = 1320922.

The previous prime is 1320911. The next prime is 1320929. The reversal of 1320923 is 3290231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320923 - 2⁶ = 1320859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320895 and 1320904.

It is not a weakly prime, because it can be changed into another prime (1320929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660461 + 660462.

It is an arithmetic number, because the mean of its divisors is an integer number (660462).

2^1320923 is an apocalyptic number.

1320923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320923 is an equidigital number, since it uses as much as digits as its factorization.

1320923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1320923 is about 1149.3141433046. The cubic root of 1320923 is about 109.7216931544.

The spelling of 1320923 in words is "one million, three hundred twenty thousand, nine hundred twenty-three".