1596989 has 2 divisors, whose sum is σ = 1596990. Its totient is φ = 1596988.

The previous prime is 1596961. The next prime is 1597033. The reversal of 1596989 is 9896951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085764 + 511225 = 1042^2 + 715^2 .

It is an emirp because it is prime and its reverse (9896951) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1596989 is a prime.

It is a super-2 number, since 2×1596989² = 5100747732242, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1596389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798494 + 798495.

It is an arithmetic number, because the mean of its divisors is an integer number (798495).

2^1596989 is an apocalyptic number.

It is an amenable number.

1596989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1596989 is an equidigital number, since it uses as much as digits as its factorization.

1596989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 47.

The square root of 1596989 is about 1263.7203013325. The cubic root of 1596989 is about 116.8872949785.

It can be divided in two parts, 15969 and 89, that multiplied together give a palindrome (1421241).

The spelling of 1596989 in words is "one million, five hundred ninety-six thousand, nine hundred eighty-nine".