389340289 has 4 divisors (see below), whose sum is σ = 419289556. Its totient is φ = 359391024.

The previous prime is 389340277. The next prime is 389340299. The reversal of 389340289 is 982043983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100340289 + 289000000 = 10017^2 + 17000^2 .

It is a cyclic number.

It is not a de Polignac number, because 389340289 - 2⁹ = 389339777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389340209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14974614 + ... + 14974639.

It is an arithmetic number, because the mean of its divisors is an integer number (104822389).

Almost surely, 2^389340289 is an apocalyptic number.

It is an amenable number.

389340289 is a deficient number, since it is larger than the sum of its proper divisors (29949267).

389340289 is a wasteful number, since it uses less digits than its factorization.

389340289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29949266.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 389340289 is about 19731.7077061262. The cubic root of 389340289 is about 730.2021639369.

The spelling of 389340289 in words is "three hundred eighty-nine million, three hundred forty thousand, two hundred eighty-nine".