1356688889 has 2 divisors, whose sum is σ = 1356688890. Its totient is φ = 1356688888.

The previous prime is 1356688873. The next prime is 1356688903. The reversal of 1356688889 is 9888866531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206381289 + 150307600 = 34733^2 + 12260^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356688889 - 2⁴ = 1356688873 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1356688819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678344444 + 678344445.

It is an arithmetic number, because the mean of its divisors is an integer number (678344445).

Almost surely, 2^1356688889 is an apocalyptic number.

It is an amenable number.

1356688889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356688889 is an equidigital number, since it uses as much as digits as its factorization.

1356688889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19906560, while the sum is 62.

The square root of 1356688889 is about 36833.2579199831. The cubic root of 1356688889 is about 1107.0317822679.

The spelling of 1356688889 in words is "one billion, three hundred fifty-six million, six hundred eighty-eight thousand, eight hundred eighty-nine".