311628419 has 2 divisors, whose sum is σ = 311628420. Its totient is φ = 311628418.

The previous prime is 311628407. The next prime is 311628463. The reversal of 311628419 is 914826113.

It is a weak prime.

It is an emirp because it is prime and its reverse (914826113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311628419 is a prime.

It is a super-2 number, since 2×311628419² = 194224543056879122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (311628469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155814209 + 155814210.

It is an arithmetic number, because the mean of its divisors is an integer number (155814210).

Almost surely, 2^311628419 is an apocalyptic number.

311628419 is a deficient number, since it is larger than the sum of its proper divisors (1).

311628419 is an equidigital number, since it uses as much as digits as its factorization.

311628419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 311628419 is about 17653.0002832380. Note that the first 3 decimals coincide. The cubic root of 311628419 is about 677.9729274235.

The spelling of 311628419 in words is "three hundred eleven million, six hundred twenty-eight thousand, four hundred nineteen".