1395439773829 has 2 divisors, whose sum is σ = 1395439773830. Its totient is φ = 1395439773828.

The previous prime is 1395439773821. The next prime is 1395439773851. The reversal of 1395439773829 is 9283779345931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 905751924100 + 489687849729 = 951710^2 + 699777^2 .

It is a cyclic number.

It is not a de Polignac number, because 1395439773829 - 2³ = 1395439773821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1395439773821) 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, 697719886914 + 697719886915.

It is an arithmetic number, because the mean of its divisors is an integer number (697719886915).

Almost surely, 2^{1395439773829} is an apocalyptic number.

It is an amenable number.

1395439773829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395439773829 is an equidigital number, since it uses as much as digits as its factorization.

1395439773829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 308629440, while the sum is 70.

The spelling of 1395439773829 in words is "one trillion, three hundred ninety-five billion, four hundred thirty-nine million, seven hundred seventy-three thousand, eight hundred twenty-nine".