689137537 has 16 divisors (see below), whose sum is σ = 759746304. Its totient is φ = 619888000.

The previous prime is 689137531. The next prime is 689137583. The reversal of 689137537 is 735731986.

It is a cyclic number.

It is not a de Polignac number, because 689137537 - 2³ = 689137529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689137531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 648987 + ... + 650047.

It is an arithmetic number, because the mean of its divisors is an integer number (47484144).

Almost surely, 2^689137537 is an apocalyptic number.

It is an amenable number.

689137537 is a deficient number, since it is larger than the sum of its proper divisors (70608767).

689137537 is a wasteful number, since it uses less digits than its factorization.

689137537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640.

The product of its digits is 952560, while the sum is 49.

The square root of 689137537 is about 26251.4292372815. The cubic root of 689137537 is about 883.2872646992.

The spelling of 689137537 in words is "six hundred eighty-nine million, one hundred thirty-seven thousand, five hundred thirty-seven".