389670349 has 2 divisors, whose sum is σ = 389670350. Its totient is φ = 389670348.

The previous prime is 389670329. The next prime is 389670367. The reversal of 389670349 is 943076983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374693449 + 14976900 = 19357^2 + 3870^2 .

It is an emirp because it is prime and its reverse (943076983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389670349 - 2⁵ = 389670317 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389670319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194835174 + 194835175.

It is an arithmetic number, because the mean of its divisors is an integer number (194835175).

Almost surely, 2^389670349 is an apocalyptic number.

It is an amenable number.

389670349 is a deficient number, since it is larger than the sum of its proper divisors (1).

389670349 is an equidigital number, since it uses as much as digits as its factorization.

389670349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 389670349 is about 19740.0696300697. The cubic root of 389670349 is about 730.4084465986.

The spelling of 389670349 in words is "three hundred eighty-nine million, six hundred seventy thousand, three hundred forty-nine".