1390506727 has 2 divisors, whose sum is σ = 1390506728. Its totient is φ = 1390506726.

The previous prime is 1390506679. The next prime is 1390506751. The reversal of 1390506727 is 7276050931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390506727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1390506727.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390506757) 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, 695253363 + 695253364.

It is an arithmetic number, because the mean of its divisors is an integer number (695253364).

Almost surely, 2^1390506727 is an apocalyptic number.

1390506727 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390506727 is an equidigital number, since it uses as much as digits as its factorization.

1390506727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 1390506727 is about 37289.4988837340. The cubic root of 1390506727 is about 1116.1546290261.

The spelling of 1390506727 in words is "one billion, three hundred ninety million, five hundred six thousand, seven hundred twenty-seven".