1205327319929 has 2 divisors, whose sum is σ = 1205327319930. Its totient is φ = 1205327319928.

The previous prime is 1205327319871. The next prime is 1205327319983. The reversal of 1205327319929 is 9299137235021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184440422400 + 20886897529 = 1088320^2 + 144523^2 .

It is an emirp because it is prime and its reverse (9299137235021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1205327319929 - 2⁸ = 1205327319673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1205327318929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602663659964 + 602663659965.

It is an arithmetic number, because the mean of its divisors is an integer number (602663659965).

Almost surely, 2^{1205327319929} is an apocalyptic number.

It is an amenable number.

1205327319929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205327319929 is an equidigital number, since it uses as much as digits as its factorization.

1205327319929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1837080, while the sum is 53.

Subtracting from 1205327319929 its sum of digits (53), we obtain a square (1205327319876 = 1097874²).

The spelling of 1205327319929 in words is "one trillion, two hundred five billion, three hundred twenty-seven million, three hundred nineteen thousand, nine hundred twenty-nine".