389029709 has 2 divisors, whose sum is σ = 389029710. Its totient is φ = 389029708.

The previous prime is 389029639. The next prime is 389029727. The reversal of 389029709 is 907920983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355134025 + 33895684 = 18845^2 + 5822^2 .

It is a cyclic number.

It is not a de Polignac number, because 389029709 - 2¹² = 389025613 is a prime.

It is a super-2 number, since 2×389029709² = 302688228969249362, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389029759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194514854 + 194514855.

It is an arithmetic number, because the mean of its divisors is an integer number (194514855).

Almost surely, 2^389029709 is an apocalyptic number.

It is an amenable number.

389029709 is a deficient number, since it is larger than the sum of its proper divisors (1).

389029709 is an equidigital number, since it uses as much as digits as its factorization.

389029709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 389029709 is about 19723.8360619835. The cubic root of 389029709 is about 730.0079494975.

The spelling of 389029709 in words is "three hundred eighty-nine million, twenty-nine thousand, seven hundred nine".