1392531773509 has 2 divisors, whose sum is σ = 1392531773510. Its totient is φ = 1392531773508.

The previous prime is 1392531773471. The next prime is 1392531773527. The reversal of 1392531773509 is 9053771352931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050055177284 + 342476596225 = 1024722^2 + 585215^2 .

It is an emirp because it is prime and its reverse (9053771352931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1392531773509 - 2²¹ = 1392529676357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1392531773509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1392531773539) 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, 696265886754 + 696265886755.

It is an arithmetic number, because the mean of its divisors is an integer number (696265886755).

Almost surely, 2^{1392531773509} is an apocalyptic number.

It is an amenable number.

1392531773509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392531773509 is an equidigital number, since it uses as much as digits as its factorization.

1392531773509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5358150, while the sum is 55.

The spelling of 1392531773509 in words is "one trillion, three hundred ninety-two billion, five hundred thirty-one million, seven hundred seventy-three thousand, five hundred nine".