1273320773 has 16 divisors (see below), whose sum is σ = 1317729600. Its totient is φ = 1229673984.

The previous prime is 1273320749. The next prime is 1273320787. The reversal of 1273320773 is 3770233721.

It is a cyclic number.

It is not a de Polignac number, because 1273320773 - 2⁶ = 1273320709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273320073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2261390 + ... + 2261952.

It is an arithmetic number, because the mean of its divisors is an integer number (82358100).

Almost surely, 2^1273320773 is an apocalyptic number.

It is an amenable number.

1273320773 is a deficient number, since it is larger than the sum of its proper divisors (44408827).

1273320773 is a wasteful number, since it uses less digits than its factorization.

1273320773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108.

The product of its (nonzero) digits is 37044, while the sum is 35.

The square root of 1273320773 is about 35683.6205141799. The cubic root of 1273320773 is about 1083.8751884570.

The spelling of 1273320773 in words is "one billion, two hundred seventy-three million, three hundred twenty thousand, seven hundred seventy-three".