671788311 has 4 divisors (see below), whose sum is σ = 895717752. Its totient is φ = 447858872.

The previous prime is 671788307. The next prime is 671788331. The reversal of 671788311 is 113887176.

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

It is a cyclic number.

It is not a de Polignac number, because 671788311 - 2² = 671788307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671788331) 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 3 ways as a sum of consecutive naturals, for example, 111964716 + ... + 111964721.

It is an arithmetic number, because the mean of its divisors is an integer number (223929438).

Almost surely, 2^671788311 is an apocalyptic number.

671788311 is a deficient number, since it is larger than the sum of its proper divisors (223929441).

671788311 is a wasteful number, since it uses less digits than its factorization.

671788311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223929440.

The product of its digits is 56448, while the sum is 42.

The square root of 671788311 is about 25918.8794317964. The cubic root of 671788311 is about 875.8118445060.

The spelling of 671788311 in words is "six hundred seventy-one million, seven hundred eighty-eight thousand, three hundred eleven".