689614537 has 8 divisors (see below), whose sum is σ = 732008232. Its totient is φ = 647424000.

The previous prime is 689614531. The next prime is 689614559. The reversal of 689614537 is 735416986.

689614537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 567821241 + 121793296 = 23829^2 + 11036^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 689614537 - 2³ = 689614529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689614531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43764 + ... + 57397.

It is an arithmetic number, because the mean of its divisors is an integer number (91501029).

Almost surely, 2^689614537 is an apocalyptic number.

It is an amenable number.

689614537 is a deficient number, since it is larger than the sum of its proper divisors (42393695).

689614537 is a wasteful number, since it uses less digits than its factorization.

689614537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101579.

The product of its digits is 1088640, while the sum is 49.

The square root of 689614537 is about 26260.5128853189. The cubic root of 689614537 is about 883.4910125385.

The spelling of 689614537 in words is "six hundred eighty-nine million, six hundred fourteen thousand, five hundred thirty-seven".