1231830487777 has 2 divisors, whose sum is σ = 1231830487778. Its totient is φ = 1231830487776.

The previous prime is 1231830487717. The next prime is 1231830487829. The reversal of 1231830487777 is 7777840381321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1069164272016 + 162666215761 = 1034004^2 + 403319^2 .

It is an emirp because it is prime and its reverse (7777840381321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231830487777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231830487717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615915243888 + 615915243889.

It is an arithmetic number, because the mean of its divisors is an integer number (615915243889).

Almost surely, 2^{1231830487777} is an apocalyptic number.

It is an amenable number.

1231830487777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231830487777 is an equidigital number, since it uses as much as digits as its factorization.

1231830487777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11063808, while the sum is 58.

The spelling of 1231830487777 in words is "one trillion, two hundred thirty-one billion, eight hundred thirty million, four hundred eighty-seven thousand, seven hundred seventy-seven".