389879197 has 2 divisors, whose sum is σ = 389879198. Its totient is φ = 389879196.

The previous prime is 389879167. The next prime is 389879227. The reversal of 389879197 is 791978983.

It is a balanced prime because it is at equal distance from previous prime (389879167) and next prime (389879227).

It can be written as a sum of positive squares in only one way, i.e., 380601081 + 9278116 = 19509^2 + 3046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389879197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389879167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194939598 + 194939599.

It is an arithmetic number, because the mean of its divisors is an integer number (194939599).

Almost surely, 2^389879197 is an apocalyptic number.

It is an amenable number.

389879197 is a deficient number, since it is larger than the sum of its proper divisors (1).

389879197 is an equidigital number, since it uses as much as digits as its factorization.

389879197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 61.

The square root of 389879197 is about 19745.3588724034. The cubic root of 389879197 is about 730.5389133715.

It can be divided in two parts, 38987 and 9197, that added together give a palindrome (48184).

The spelling of 389879197 in words is "three hundred eighty-nine million, eight hundred seventy-nine thousand, one hundred ninety-seven".