312727819 has 2 divisors, whose sum is σ = 312727820. Its totient is φ = 312727818.

The previous prime is 312727817. The next prime is 312727837. The reversal of 312727819 is 918727213.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (918727213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312727819 - 2¹ = 312727817 is a prime.

It is a super-2 number, since 2×312727819² = 195597377552993522, which contains 22 as substring.

Together with 312727817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (312727817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156363909 + 156363910.

It is an arithmetic number, because the mean of its divisors is an integer number (156363910).

Almost surely, 2^312727819 is an apocalyptic number.

312727819 is a deficient number, since it is larger than the sum of its proper divisors (1).

312727819 is an equidigital number, since it uses as much as digits as its factorization.

312727819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 40.

The square root of 312727819 is about 17684.1120500861. The cubic root of 312727819 is about 678.7692696669.

The spelling of 312727819 in words is "three hundred twelve million, seven hundred twenty-seven thousand, eight hundred nineteen".