1980000923 has 2 divisors, whose sum is σ = 1980000924. Its totient is φ = 1980000922.

The previous prime is 1980000881. The next prime is 1980000949. The reversal of 1980000923 is 3290000891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1980000923 - 2⁶ = 1980000859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1980000923.

It is not a weakly prime, because it can be changed into another prime (1980000223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990000461 + 990000462.

It is an arithmetic number, because the mean of its divisors is an integer number (990000462).

Almost surely, 2^1980000923 is an apocalyptic number.

1980000923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980000923 is an equidigital number, since it uses as much as digits as its factorization.

1980000923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1980000923 is about 44497.2012940140. The cubic root of 1980000923 is about 1255.7074307647.

Subtracting from 1980000923 its sum of digits (32), we obtain a palindrome (1980000891).

The spelling of 1980000923 in words is "one billion, nine hundred eighty million, nine hundred twenty-three", and thus it is an aban number.