1445277643 has 2 divisors, whose sum is σ = 1445277644. Its totient is φ = 1445277642.

The previous prime is 1445277607. The next prime is 1445277677. The reversal of 1445277643 is 3467725441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1445277643 - 2⁹ = 1445277131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1445277643.

It is not a weakly prime, because it can be changed into another prime (1445277143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722638821 + 722638822.

It is an arithmetic number, because the mean of its divisors is an integer number (722638822).

Almost surely, 2^1445277643 is an apocalyptic number.

1445277643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445277643 is an equidigital number, since it uses as much as digits as its factorization.

1445277643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 43.

The square root of 1445277643 is about 38016.8073751597. The cubic root of 1445277643 is about 1130.6211227505.

The spelling of 1445277643 in words is "one billion, four hundred forty-five million, two hundred seventy-seven thousand, six hundred forty-three".