311698 has 4 divisors (see below), whose sum is σ = 467550. Its totient is φ = 155848.

The previous prime is 311687. The next prime is 311711. The reversal of 311698 is 896113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 237169 + 74529 = 487^2 + 273^2 .

It is an unprimeable number.

311698 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77923 + ... + 77926.

2³¹¹⁶⁹⁸ is an apocalyptic number.

311698 is a deficient number, since it is larger than the sum of its proper divisors (155852).

311698 is a wasteful number, since it uses less digits than its factorization.

311698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155851.

The product of its digits is 1296, while the sum is 28.

The square root of 311698 is about 558.2992029369. The cubic root of 311698 is about 67.8023383373.

The spelling of 311698 in words is "three hundred eleven thousand, six hundred ninety-eight".