311432947 has 8 divisors (see below), whose sum is σ = 359189600. Its totient is φ = 264492864.

The previous prime is 311432939. The next prime is 311432969. The reversal of 311432947 is 749234113.

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 311432947 - 2³ = 311432939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311432047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203322 + ... + 204847.

It is an arithmetic number, because the mean of its divisors is an integer number (44898700).

Almost surely, 2^311432947 is an apocalyptic number.

311432947 is a deficient number, since it is larger than the sum of its proper divisors (47756653).

311432947 is a wasteful number, since it uses less digits than its factorization.

311432947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408285.

The product of its digits is 18144, while the sum is 34.

The square root of 311432947 is about 17647.4629054717. The cubic root of 311432947 is about 677.8311427051.

The spelling of 311432947 in words is "three hundred eleven million, four hundred thirty-two thousand, nine hundred forty-seven".