1931402644273 has 2 divisors, whose sum is σ = 1931402644274. Its totient is φ = 1931402644272.

The previous prime is 1931402644219. The next prime is 1931402644309. The reversal of 1931402644273 is 3724462041391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1841359439089 + 90043205184 = 1356967^2 + 300072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1931402644273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1931402645273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965701322136 + 965701322137.

It is an arithmetic number, because the mean of its divisors is an integer number (965701322137).

Almost surely, 2^{1931402644273} is an apocalyptic number.

It is an amenable number.

1931402644273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1931402644273 is an equidigital number, since it uses as much as digits as its factorization.

1931402644273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 46.

It can be divided in two parts, 1931 and 402644273, that added together give a palindrome (402646204).

The spelling of 1931402644273 in words is "one trillion, nine hundred thirty-one billion, four hundred two million, six hundred forty-four thousand, two hundred seventy-three".