389432429 has 2 divisors, whose sum is σ = 389432430. Its totient is φ = 389432428.

The previous prime is 389432411. The next prime is 389432471. The reversal of 389432429 is 924234983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 375196900 + 14235529 = 19370^2 + 3773^2 .

It is a cyclic number.

It is not a de Polignac number, because 389432429 - 2¹⁶ = 389366893 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 389432429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389432489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194716214 + 194716215.

It is an arithmetic number, because the mean of its divisors is an integer number (194716215).

Almost surely, 2^389432429 is an apocalyptic number.

It is an amenable number.

389432429 is a deficient number, since it is larger than the sum of its proper divisors (1).

389432429 is an equidigital number, since it uses as much as digits as its factorization.

389432429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 44.

The square root of 389432429 is about 19734.0423887251. The cubic root of 389432429 is about 730.2597618125.

The spelling of 389432429 in words is "three hundred eighty-nine million, four hundred thirty-two thousand, four hundred twenty-nine".