3980000729 has 2 divisors, whose sum is σ = 3980000730. Its totient is φ = 3980000728.

The previous prime is 3980000723. The next prime is 3980000743. The reversal of 3980000729 is 9270000893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3966480400 + 13520329 = 62980^2 + 3677^2 .

It is an emirp because it is prime and its reverse (9270000893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3980000729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3980000692 and 3980000701.

It is not a weakly prime, because it can be changed into another prime (3980000723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990000364 + 1990000365.

It is an arithmetic number, because the mean of its divisors is an integer number (1990000365).

Almost surely, 2^3980000729 is an apocalyptic number.

It is an amenable number.

3980000729 is a deficient number, since it is larger than the sum of its proper divisors (1).

3980000729 is an equidigital number, since it uses as much as digits as its factorization.

3980000729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 3980000729 is about 63087.2469600632. The cubic root of 3980000729 is about 1584.7510585688.

The spelling of 3980000729 in words is "three billion, nine hundred eighty million, seven hundred twenty-nine", and thus it is an aban number.