1356565993 has 2 divisors, whose sum is σ = 1356565994. Its totient is φ = 1356565992.

The previous prime is 1356565979. The next prime is 1356566063. The reversal of 1356565993 is 3995656531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 747858409 + 608707584 = 27347^2 + 24672^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356565993 - 2²⁵ = 1323011561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1356565993.

It is not a weakly prime, because it can be changed into another prime (1356565963) 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, 678282996 + 678282997.

It is an arithmetic number, because the mean of its divisors is an integer number (678282997).

Almost surely, 2^1356565993 is an apocalyptic number.

It is an amenable number.

1356565993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356565993 is an equidigital number, since it uses as much as digits as its factorization.

1356565993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3280500, while the sum is 52.

The square root of 1356565993 is about 36831.5896072923. The cubic root of 1356565993 is about 1106.9983543422.

The spelling of 1356565993 in words is "one billion, three hundred fifty-six million, five hundred sixty-five thousand, nine hundred ninety-three".