1335648649 has 2 divisors, whose sum is σ = 1335648650. Its totient is φ = 1335648648.

The previous prime is 1335648641. The next prime is 1335648697. The reversal of 1335648649 is 9468465331.

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., 1186320249 + 149328400 = 34443^2 + 12220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1335648649 - 2³ = 1335648641 is a prime.

It is not a weakly prime, because it can be changed into another prime (1335648641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667824324 + 667824325.

It is an arithmetic number, because the mean of its divisors is an integer number (667824325).

Almost surely, 2^1335648649 is an apocalyptic number.

It is an amenable number.

1335648649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1335648649 is an equidigital number, since it uses as much as digits as its factorization.

1335648649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 49.

The square root of 1335648649 is about 36546.5271811153. The cubic root of 1335648649 is about 1101.2791315486.

The spelling of 1335648649 in words is "one billion, three hundred thirty-five million, six hundred forty-eight thousand, six hundred forty-nine".