311909950843 has 4 divisors (see below), whose sum is σ = 312413844760. Its totient is φ = 311406056928.

The previous prime is 311909950831. The next prime is 311909950879. The reversal of 311909950843 is 348059909113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311909950843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311909950043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251946030 + ... + 251947267.

It is an arithmetic number, because the mean of its divisors is an integer number (78103461190).

Almost surely, 2^311909950843 is an apocalyptic number.

311909950843 is a deficient number, since it is larger than the sum of its proper divisors (503893917).

311909950843 is an equidigital number, since it uses as much as digits as its factorization.

311909950843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503893916.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The spelling of 311909950843 in words is "three hundred eleven billion, nine hundred nine million, nine hundred fifty thousand, eight hundred forty-three".