1980029 has 2 divisors, whose sum is σ = 1980030. Its totient is φ = 1980028.

The previous prime is 1980023. The next prime is 1980031. The reversal of 1980029 is 9200891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1214404 + 765625 = 1102^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980029 - 2⁸ = 1979773 is a prime.

Together with 1980031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1979983 and 1980010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990014 + 990015.

It is an arithmetic number, because the mean of its divisors is an integer number (990015).

2^1980029 is an apocalyptic number.

It is an amenable number.

1980029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980029 is an equidigital number, since it uses as much as digits as its factorization.

1980029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1980029 is about 1407.1350326106. The cubic root of 1980029 is about 125.5713366171.

The spelling of 1980029 in words is "one million, nine hundred eighty thousand, twenty-nine".