311969 has 8 divisors (see below), whose sum is σ = 365568. Its totient is φ = 260640.

The previous prime is 311963. The next prime is 311981. The reversal of 311969 is 969113.

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 311969 - 2⁸ = 311713 is a prime.

It is a super-2 number, since 2×311969² = 194649313922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (311963) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 257 + ... + 830.

It is an arithmetic number, because the mean of its divisors is an integer number (45696).

2³¹¹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

311969 is a deficient number, since it is larger than the sum of its proper divisors (53599).

311969 is a wasteful number, since it uses less digits than its factorization.

311969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135.

The product of its digits is 1458, while the sum is 29.

The square root of 311969 is about 558.5418516101. The cubic root of 311969 is about 67.8219824706.

The spelling of 311969 in words is "three hundred eleven thousand, nine hundred sixty-nine".