1395834687749 has 2 divisors, whose sum is σ = 1395834687750. Its totient is φ = 1395834687748.

The previous prime is 1395834687743. The next prime is 1395834687799. The reversal of 1395834687749 is 9477864385931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200762298849 + 195072388900 = 1095793^2 + 441670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1395834687749 - 2⁴ = 1395834687733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1395834687743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697917343874 + 697917343875.

It is an arithmetic number, because the mean of its divisors is an integer number (697917343875).

Almost surely, 2^{1395834687749} is an apocalyptic number.

It is an amenable number.

1395834687749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395834687749 is an equidigital number, since it uses as much as digits as its factorization.

1395834687749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1097349120, while the sum is 74.

The spelling of 1395834687749 in words is "one trillion, three hundred ninety-five billion, eight hundred thirty-four million, six hundred eighty-seven thousand, seven hundred forty-nine".