1689501073 has 4 divisors (see below), whose sum is σ = 1819462708. Its totient is φ = 1559539440.

The previous prime is 1689501059. The next prime is 1689501083. The reversal of 1689501073 is 3701059861.

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 1087878289 + 601622784 = 32983^2 + 24528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1689501073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689501083) 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, 64980798 + ... + 64980823.

It is an arithmetic number, because the mean of its divisors is an integer number (454865677).

Almost surely, 2^1689501073 is an apocalyptic number.

1689501073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1689501073 is a deficient number, since it is larger than the sum of its proper divisors (129961635).

1689501073 is a wasteful number, since it uses less digits than its factorization.

1689501073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129961634.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1689501073 is about 41103.5408815348. The cubic root of 1689501073 is about 1191.0211964758.

The spelling of 1689501073 in words is "one billion, six hundred eighty-nine million, five hundred one thousand, seventy-three".