1327691929 has 2 divisors, whose sum is σ = 1327691930. Its totient is φ = 1327691928.

The previous prime is 1327691921. The next prime is 1327691957. The reversal of 1327691929 is 9291967231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1307907225 + 19784704 = 36165^2 + 4448^2 .

It is an emirp because it is prime and its reverse (9291967231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1327691929 - 2³ = 1327691921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1327691921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663845964 + 663845965.

It is an arithmetic number, because the mean of its divisors is an integer number (663845965).

Almost surely, 2^1327691929 is an apocalyptic number.

It is an amenable number.

1327691929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1327691929 is an equidigital number, since it uses as much as digits as its factorization.

1327691929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 49.

The square root of 1327691929 is about 36437.5071732411. The cubic root of 1327691929 is about 1099.0879296364.

The spelling of 1327691929 in words is "one billion, three hundred twenty-seven million, six hundred ninety-one thousand, nine hundred twenty-nine".