311663 has 8 divisors (see below), whose sum is σ = 352080. Its totient is φ = 273280.

The previous prime is 311659. The next prime is 311677. The reversal of 311663 is 366113.

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 311663 - 2² = 311659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311603) 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, 170 + ... + 807.

It is an arithmetic number, because the mean of its divisors is an integer number (44010).

2³¹¹⁶⁶³ is an apocalyptic number.

311663 is a deficient number, since it is larger than the sum of its proper divisors (40417).

311663 is a wasteful number, since it uses less digits than its factorization.

311663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017.

The product of its digits is 324, while the sum is 20.

The square root of 311663 is about 558.2678568573. The cubic root of 311663 is about 67.7998004420.

Adding to 311663 its reverse (366113), we get a palindrome (677776).

The spelling of 311663 in words is "three hundred eleven thousand, six hundred sixty-three".