1364321989 has 2 divisors, whose sum is σ = 1364321990. Its totient is φ = 1364321988.

The previous prime is 1364321963. The next prime is 1364322041. The reversal of 1364321989 is 9891234631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 792872964 + 571449025 = 28158^2 + 23905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1364321989 - 2⁹ = 1364321477 is a prime.

It is a super-2 number, since 2×1364321989² = 3722748979337832242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1364321909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682160994 + 682160995.

It is an arithmetic number, because the mean of its divisors is an integer number (682160995).

Almost surely, 2^1364321989 is an apocalyptic number.

It is an amenable number.

1364321989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1364321989 is an equidigital number, since it uses as much as digits as its factorization.

1364321989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 1364321989 is about 36936.7295384960. The cubic root of 1364321989 is about 1109.1040545051.

The spelling of 1364321989 in words is "one billion, three hundred sixty-four million, three hundred twenty-one thousand, nine hundred eighty-nine".