1319604989 has 2 divisors, whose sum is σ = 1319604990. Its totient is φ = 1319604988.

The previous prime is 1319604983. The next prime is 1319605039. The reversal of 1319604989 is 9894069131.

It is an a-pointer prime, because the next prime (1319605039) can be obtained adding 1319604989 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 711982489 + 607622500 = 26683^2 + 24650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1319604989 - 2⁴ = 1319604973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1319604983) 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, 659802494 + 659802495.

It is an arithmetic number, because the mean of its divisors is an integer number (659802495).

Almost surely, 2^1319604989 is an apocalyptic number.

It is an amenable number.

1319604989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319604989 is an equidigital number, since it uses as much as digits as its factorization.

1319604989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 1319604989 is about 36326.3676824425. The cubic root of 1319604989 is about 1096.8518774021.

The spelling of 1319604989 in words is "one billion, three hundred nineteen million, six hundred four thousand, nine hundred eighty-nine".