311397 has 8 divisors (see below), whose sum is σ = 433344. Its totient is φ = 198528.

The previous prime is 311393. The next prime is 311407. The reversal of 311397 is 793113.

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

It is not a de Polignac number, because 311397 - 2² = 311393 is a prime.

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 311397.

It is not an unprimeable number, because it can be changed into a prime (311393) 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, 2188 + ... + 2325.

It is an arithmetic number, because the mean of its divisors is an integer number (54168).

2³¹¹³⁹⁷ is an apocalyptic number.

It is an amenable number.

311397 is a deficient number, since it is larger than the sum of its proper divisors (121947).

311397 is a wasteful number, since it uses less digits than its factorization.

311397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539.

The product of its digits is 567, while the sum is 24.

The square root of 311397 is about 558.0295691090. The cubic root of 311397 is about 67.7805062256.

It can be divided in two parts, 3 and 11397, that multiplied together give a triangular number (34191 = T₂₆₁).

The spelling of 311397 in words is "three hundred eleven thousand, three hundred ninety-seven".