689697129 has 32 divisors (see below), whose sum is σ = 1039988736. Its totient is φ = 402937920.

The previous prime is 689697119. The next prime is 689697137. The reversal of 689697129 is 921796986.

It is not a de Polignac number, because 689697129 - 2⁹ = 689696617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689697119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100599 + ... + 107235.

It is an arithmetic number, because the mean of its divisors is an integer number (32499648).

Almost surely, 2^689697129 is an apocalyptic number.

It is an amenable number.

689697129 is a deficient number, since it is larger than the sum of its proper divisors (350291607).

689697129 is a wasteful number, since it uses less digits than its factorization.

689697129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6765.

The product of its digits is 2939328, while the sum is 57.

The square root of 689697129 is about 26262.0853893974. The cubic root of 689697129 is about 883.5262816988.

The spelling of 689697129 in words is "six hundred eighty-nine million, six hundred ninety-seven thousand, one hundred twenty-nine".