1980929 has 2 divisors, whose sum is σ = 1980930. Its totient is φ = 1980928.

The previous prime is 1980919. The next prime is 1980941. The reversal of 1980929 is 9290891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1106704 + 874225 = 1052^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980929 - 2⁸ = 1980673 is a prime.

It is a Chen prime.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1980892 and 1980901.

It is not a weakly prime, because it can be changed into another prime (1980919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990464 + 990465.

It is an arithmetic number, because the mean of its divisors is an integer number (990465).

2^1980929 is an apocalyptic number.

It is an amenable number.

1980929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980929 is an equidigital number, since it uses as much as digits as its factorization.

1980929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1980929 is about 1407.4547950112. The cubic root of 1980929 is about 125.5903594166.

Subtracting from 1980929 its sum of digits (38), we obtain a palindrome (1980891).

The spelling of 1980929 in words is "one million, nine hundred eighty thousand, nine hundred twenty-nine".