1399638827 has 2 divisors, whose sum is σ = 1399638828. Its totient is φ = 1399638826.

The previous prime is 1399638817. The next prime is 1399638901. The reversal of 1399638827 is 7288369931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1399638827 - 2⁶ = 1399638763 is a prime.

It is not a weakly prime, because it can be changed into another prime (1399638817) 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, 699819413 + 699819414.

It is an arithmetic number, because the mean of its divisors is an integer number (699819414).

Almost surely, 2^1399638827 is an apocalyptic number.

1399638827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399638827 is an equidigital number, since it uses as much as digits as its factorization.

1399638827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 56.

The square root of 1399638827 is about 37411.7471791949. The cubic root of 1399638827 is about 1118.5927337502.

The spelling of 1399638827 in words is "one billion, three hundred ninety-nine million, six hundred thirty-eight thousand, eight hundred twenty-seven".