389646449 has 2 divisors, whose sum is σ = 389646450. Its totient is φ = 389646448.

The previous prime is 389646437. The next prime is 389646463. The reversal of 389646449 is 944646983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348494224 + 41152225 = 18668^2 + 6415^2 .

It is a cyclic number.

It is not a de Polignac number, because 389646449 - 2⁸ = 389646193 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389646449.

It is not a weakly prime, because it can be changed into another prime (389646419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194823224 + 194823225.

It is an arithmetic number, because the mean of its divisors is an integer number (194823225).

Almost surely, 2^389646449 is an apocalyptic number.

It is an amenable number.

389646449 is a deficient number, since it is larger than the sum of its proper divisors (1).

389646449 is an equidigital number, since it uses as much as digits as its factorization.

389646449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 53.

The square root of 389646449 is about 19739.4642531149. The cubic root of 389646449 is about 730.3935133618.

The spelling of 389646449 in words is "three hundred eighty-nine million, six hundred forty-six thousand, four hundred forty-nine".