689999001 has 32 divisors (see below), whose sum is σ = 967127040. Its totient is φ = 437020416.

The previous prime is 689998949. The next prime is 689999017. The reversal of 689999001 is 100999986.

It is not a de Polignac number, because 689999001 - 2⁶ = 689998937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689999071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2176495 + ... + 2176811.

It is an arithmetic number, because the mean of its divisors is an integer number (30222720).

Almost surely, 2^689999001 is an apocalyptic number.

It is an amenable number.

689999001 is a deficient number, since it is larger than the sum of its proper divisors (277128039).

689999001 is a wasteful number, since it uses less digits than its factorization.

689999001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673.

The product of its (nonzero) digits is 314928, while the sum is 51.

The square root of 689999001 is about 26267.8320574805. The cubic root of 689999001 is about 883.6551657803.

The spelling of 689999001 in words is "six hundred eighty-nine million, nine hundred ninety-nine thousand, one".