1327990747 has 4 divisors (see below), whose sum is σ = 1328106600. Its totient is φ = 1327874896.

The previous prime is 1327990739. The next prime is 1327990753. The reversal of 1327990747 is 7470997231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7470997231 = 109 ⋅68541259.

It is a cyclic number.

It is not a de Polignac number, because 1327990747 - 2³ = 1327990739 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1327990747.

It is not an unprimeable number, because it can be changed into a prime (1327990777) 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 in 3 ways as a sum of consecutive naturals, for example, 38578 + ... + 64375.

It is an arithmetic number, because the mean of its divisors is an integer number (332026650).

Almost surely, 2^1327990747 is an apocalyptic number.

1327990747 is a deficient number, since it is larger than the sum of its proper divisors (115853).

1327990747 is a wasteful number, since it uses less digits than its factorization.

1327990747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115852.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 1327990747 is about 36441.6073602688. The cubic root of 1327990747 is about 1099.1703791398.

The spelling of 1327990747 in words is "one billion, three hundred twenty-seven million, nine hundred ninety thousand, seven hundred forty-seven".