311369 has 4 divisors (see below), whose sum is σ = 314496. Its totient is φ = 308244.

The previous prime is 311359. The next prime is 311371. The reversal of 311369 is 963113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 963113 = 97 ⋅9929.

It is a cyclic number.

It is not a de Polignac number, because 311369 - 2¹² = 307273 is a prime.

It is a super-2 number, since 2×311369² = 193901308322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 311369.

It is not an unprimeable number, because it can be changed into a prime (311329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409 + ... + 1614.

It is an arithmetic number, because the mean of its divisors is an integer number (78624).

2³¹¹³⁶⁹ is an apocalyptic number.

It is an amenable number.

311369 is a deficient number, since it is larger than the sum of its proper divisors (3127).

311369 is a wasteful number, since it uses less digits than its factorization.

311369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3126.

The product of its digits is 486, while the sum is 23.

The square root of 311369 is about 558.0044802688. The cubic root of 311369 is about 67.7784746163.

The spelling of 311369 in words is "three hundred eleven thousand, three hundred sixty-nine".