1602389 has 2 divisors, whose sum is σ = 1602390. Its totient is φ = 1602388.

The previous prime is 1602383. The next prime is 1602397. The reversal of 1602389 is 9832061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1119364 + 483025 = 1058^2 + 695^2 .

It is an emirp because it is prime and its reverse (9832061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1602389 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1602383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801194 + 801195.

It is an arithmetic number, because the mean of its divisors is an integer number (801195).

2^1602389 is an apocalyptic number.

It is an amenable number.

1602389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1602389 is an equidigital number, since it uses as much as digits as its factorization.

1602389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1602389 is about 1265.8550469939. The cubic root of 1602389 is about 117.0188928996.

It can be divided in two parts, 1602 and 389, that added together give a palindrome (1991).

The spelling of 1602389 in words is "one million, six hundred two thousand, three hundred eighty-nine".