389602261 has 2 divisors, whose sum is σ = 389602262. Its totient is φ = 389602260.

The previous prime is 389602259. The next prime is 389602289. The reversal of 389602261 is 162206983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 342953361 + 46648900 = 18519^2 + 6830^2 .

It is a cyclic number.

It is not a de Polignac number, because 389602261 - 2¹ = 389602259 is a prime.

Together with 389602259, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 389602261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389602361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194801130 + 194801131.

It is an arithmetic number, because the mean of its divisors is an integer number (194801131).

Almost surely, 2^389602261 is an apocalyptic number.

It is an amenable number.

389602261 is a deficient number, since it is larger than the sum of its proper divisors (1).

389602261 is an equidigital number, since it uses as much as digits as its factorization.

389602261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 389602261 is about 19738.3449407492. The cubic root of 389602261 is about 730.3659021356.

The spelling of 389602261 in words is "three hundred eighty-nine million, six hundred two thousand, two hundred sixty-one".