1384145561 has 2 divisors, whose sum is σ = 1384145562. Its totient is φ = 1384145560.

The previous prime is 1384145507. The next prime is 1384145579. The reversal of 1384145561 is 1655414831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 967210000 + 416935561 = 31100^2 + 20419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1384145561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1384145501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692072780 + 692072781.

It is an arithmetic number, because the mean of its divisors is an integer number (692072781).

Almost surely, 2^1384145561 is an apocalyptic number.

It is an amenable number.

1384145561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1384145561 is an equidigital number, since it uses as much as digits as its factorization.

1384145561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 38.

The square root of 1384145561 is about 37204.1067759999. The cubic root of 1384145561 is about 1114.4499988067.

The spelling of 1384145561 in words is "one billion, three hundred eighty-four million, one hundred forty-five thousand, five hundred sixty-one".