311948473 has 4 divisors (see below), whose sum is σ = 312246900. Its totient is φ = 311650048.

The previous prime is 311948401. The next prime is 311948501. The reversal of 311948473 is 374849113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 374849113 = 313 ⋅1197601.

It can be written as a sum of positive squares in 2 ways, for example, as 256416169 + 55532304 = 16013^2 + 7452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311948473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311948173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147640 + ... + 149737.

It is an arithmetic number, because the mean of its divisors is an integer number (78061725).

Almost surely, 2^311948473 is an apocalyptic number.

It is an amenable number.

311948473 is a deficient number, since it is larger than the sum of its proper divisors (298427).

311948473 is a wasteful number, since it uses less digits than its factorization.

311948473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298426.

The product of its digits is 72576, while the sum is 40.

The square root of 311948473 is about 17662.0631014613. The cubic root of 311948473 is about 678.2049491643.

The spelling of 311948473 in words is "three hundred eleven million, nine hundred forty-eight thousand, four hundred seventy-three".