386989 has 2 divisors, whose sum is σ = 386990. Its totient is φ = 386988.

The previous prime is 386987. The next prime is 386993. The reversal of 386989 is 989683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311364 + 75625 = 558^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 386989 - 2¹ = 386987 is a prime.

It is a super-2 number, since 2×386989² = 299520972242, which contains 22 as substring.

Together with 386987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193494 + 193495.

It is an arithmetic number, because the mean of its divisors is an integer number (193495).

2³⁸⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

386989 is a deficient number, since it is larger than the sum of its proper divisors (1).

386989 is an equidigital number, since it uses as much as digits as its factorization.

386989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 386989 is about 622.0843994186. The cubic root of 386989 is about 72.8729258570.

The spelling of 386989 in words is "three hundred eighty-six thousand, nine hundred eighty-nine".