311934387 has 4 divisors (see below), whose sum is σ = 415912520. Its totient is φ = 207956256.

The previous prime is 311934361. The next prime is 311934391. The reversal of 311934387 is 783439113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783439113 = 3 ⋅261146371.

It is not a de Polignac number, because 311934387 - 2²³ = 303545779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311934787) 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, 51989062 + ... + 51989067.

It is an arithmetic number, because the mean of its divisors is an integer number (103978130).

Almost surely, 2^311934387 is an apocalyptic number.

311934387 is a deficient number, since it is larger than the sum of its proper divisors (103978133).

311934387 is a wasteful number, since it uses less digits than its factorization.

311934387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103978132.

The product of its digits is 54432, while the sum is 39.

The square root of 311934387 is about 17661.6643326726. The cubic root of 311934387 is about 678.1947409200.

The spelling of 311934387 in words is "three hundred eleven million, nine hundred thirty-four thousand, three hundred eighty-seven".