1689018337 has 4 divisors (see below), whose sum is σ = 1701347076. Its totient is φ = 1676689600.

The previous prime is 1689018307. The next prime is 1689018389. The reversal of 1689018337 is 7338109861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7338109861 = 2161 ⋅3395701.

It can be written as a sum of positive squares in 2 ways, for example, as 1107292176 + 581726161 = 33276^2 + 24119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1689018337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689018307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6164164 + ... + 6164437.

It is an arithmetic number, because the mean of its divisors is an integer number (425336769).

Almost surely, 2^1689018337 is an apocalyptic number.

It is an amenable number.

1689018337 is a deficient number, since it is larger than the sum of its proper divisors (12328739).

1689018337 is a wasteful number, since it uses less digits than its factorization.

1689018337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12328738.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1689018337 is about 41097.6682671900. The cubic root of 1689018337 is about 1190.9077500496.

The spelling of 1689018337 in words is "one billion, six hundred eighty-nine million, eighteen thousand, three hundred thirty-seven".