311689689 has 8 divisors (see below), whose sum is σ = 415668192. Its totient is φ = 207752160.

The previous prime is 311689663. The next prime is 311689723. The reversal of 311689689 is 986986113.

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

It is not a de Polignac number, because 311689689 - 2¹¹ = 311687641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311689589) 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 7 ways as a sum of consecutive naturals, for example, 22102 + ... + 33344.

It is an arithmetic number, because the mean of its divisors is an integer number (51958524).

Almost surely, 2^311689689 is an apocalyptic number.

It is an amenable number.

311689689 is a deficient number, since it is larger than the sum of its proper divisors (103978503).

311689689 is a wasteful number, since it uses less digits than its factorization.

311689689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20487.

The product of its digits is 559872, while the sum is 51.

The square root of 311689689 is about 17654.7355970006. The cubic root of 311689689 is about 678.0173571317.

The spelling of 311689689 in words is "three hundred eleven million, six hundred eighty-nine thousand, six hundred eighty-nine".