1319364649 has 4 divisors (see below), whose sum is σ = 1320750036. Its totient is φ = 1317979264.

The previous prime is 1319364647. The next prime is 1319364653. The reversal of 1319364649 is 9464639131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 510986025 + 808378624 = 22605^2 + 28432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1319364649 - 2¹ = 1319364647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1319364599 and 1319364608.

It is not an unprimeable number, because it can be changed into a prime (1319364647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691264 + ... + 693169.

It is an arithmetic number, because the mean of its divisors is an integer number (330187509).

Almost surely, 2^1319364649 is an apocalyptic number.

It is an amenable number.

1319364649 is a deficient number, since it is larger than the sum of its proper divisors (1385387).

1319364649 is an equidigital number, since it uses as much as digits as its factorization.

1319364649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385386.

The product of its digits is 419904, while the sum is 46.

The square root of 1319364649 is about 36323.0594664051. The cubic root of 1319364649 is about 1096.7852833864.

The spelling of 1319364649 in words is "one billion, three hundred nineteen million, three hundred sixty-four thousand, six hundred forty-nine".