1445308649 has 2 divisors, whose sum is σ = 1445308650. Its totient is φ = 1445308648.

The previous prime is 1445308643. The next prime is 1445308673. The reversal of 1445308649 is 9468035441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1433985424 + 11323225 = 37868^2 + 3365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1445308649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1445308643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722654324 + 722654325.

It is an arithmetic number, because the mean of its divisors is an integer number (722654325).

Almost surely, 2^1445308649 is an apocalyptic number.

It is an amenable number.

1445308649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445308649 is an equidigital number, since it uses as much as digits as its factorization.

1445308649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 1445308649 is about 38017.2151662901. The cubic root of 1445308649 is about 1130.6292078840.

The spelling of 1445308649 in words is "one billion, four hundred forty-five million, three hundred eight thousand, six hundred forty-nine".