311949299873 has 4 divisors (see below), whose sum is σ = 311967172608. Its totient is φ = 311931427140.

The previous prime is 311949299839. The next prime is 311949299899. The reversal of 311949299873 is 378992949113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311949299873 - 2³⁸ = 37071392929 is a prime.

It is a super-2 number, since 2×311949299873² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311949292873) 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, 8910161 + ... + 8945102.

It is an arithmetic number, because the mean of its divisors is an integer number (77991793152).

Almost surely, 2^311949299873 is an apocalyptic number.

It is an amenable number.

311949299873 is a deficient number, since it is larger than the sum of its proper divisors (17872735).

311949299873 is a wasteful number, since it uses less digits than its factorization.

311949299873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17872734.

The product of its digits is 26453952, while the sum is 65.

The spelling of 311949299873 in words is "three hundred eleven billion, nine hundred forty-nine million, two hundred ninety-nine thousand, eight hundred seventy-three".