389449253 has 2 divisors, whose sum is σ = 389449254. Its totient is φ = 389449252.

The previous prime is 389449171. The next prime is 389449267. The reversal of 389449253 is 352944983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386633569 + 2815684 = 19663^2 + 1678^2 .

It is an emirp because it is prime and its reverse (352944983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389449253 - 2¹⁰ = 389448229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 389449198 and 389449207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389449553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194724626 + 194724627.

It is an arithmetic number, because the mean of its divisors is an integer number (194724627).

Almost surely, 2^389449253 is an apocalyptic number.

It is an amenable number.

389449253 is a deficient number, since it is larger than the sum of its proper divisors (1).

389449253 is an equidigital number, since it uses as much as digits as its factorization.

389449253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 47.

The square root of 389449253 is about 19734.4686525885. The cubic root of 389449253 is about 730.2702777261.

The spelling of 389449253 in words is "three hundred eighty-nine million, four hundred forty-nine thousand, two hundred fifty-three".