311486210808389 has 2 divisors, whose sum is σ = 311486210808390. Its totient is φ = 311486210808388.

The previous prime is 311486210808349. The next prime is 311486210808427. The reversal of 311486210808389 is 983808012684113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206135652630625 + 105350558177764 = 14357425^2 + 10264042^2 .

It is a cyclic number.

It is not a de Polignac number, because 311486210808389 - 2¹⁶ = 311486210742853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311486210808349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155743105404194 + 155743105404195.

It is an arithmetic number, because the mean of its divisors is an integer number (155743105404195).

Almost surely, 2^{311486210808389} is an apocalyptic number.

It is an amenable number.

311486210808389 is a deficient number, since it is larger than the sum of its proper divisors (1).

311486210808389 is an equidigital number, since it uses as much as digits as its factorization.

311486210808389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15925248, while the sum is 62.

The spelling of 311486210808389 in words is "three hundred eleven trillion, four hundred eighty-six billion, two hundred ten million, eight hundred eight thousand, three hundred eighty-nine".