1365948889 has 2 divisors, whose sum is σ = 1365948890. Its totient is φ = 1365948888.

The previous prime is 1365948853. The next prime is 1365948901. The reversal of 1365948889 is 9888495631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1361610000 + 4338889 = 36900^2 + 2083^2 .

It is a cyclic number.

It is not a de Polignac number, because 1365948889 - 2⁹ = 1365948377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1365948809) 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, 682974444 + 682974445.

It is an arithmetic number, because the mean of its divisors is an integer number (682974445).

Almost surely, 2^1365948889 is an apocalyptic number.

It is an amenable number.

1365948889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1365948889 is an equidigital number, since it uses as much as digits as its factorization.

1365948889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14929920, while the sum is 61.

The square root of 1365948889 is about 36958.7457714679. The cubic root of 1365948889 is about 1109.5447336238.

The spelling of 1365948889 in words is "one billion, three hundred sixty-five million, nine hundred forty-eight thousand, eight hundred eighty-nine".