1970729 has 2 divisors, whose sum is σ = 1970730. Its totient is φ = 1970728.

The previous prime is 1970719. The next prime is 1970743. The reversal of 1970729 is 9270791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1567504 + 403225 = 1252^2 + 635^2 .

It is an emirp because it is prime and its reverse (9270791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1970729 - 2⁴ = 1970713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1970719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985364 + 985365.

It is an arithmetic number, because the mean of its divisors is an integer number (985365).

2^1970729 is an apocalyptic number.

It is an amenable number.

1970729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1970729 is an equidigital number, since it uses as much as digits as its factorization.

1970729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 1970729 is about 1403.8265562383. The cubic root of 1970729 is about 125.3744293017.

The spelling of 1970729 in words is "one million, nine hundred seventy thousand, seven hundred twenty-nine".