1380668273 has 4 divisors (see below), whose sum is σ = 1381633188. Its totient is φ = 1379703360.

The previous prime is 1380668257. The next prime is 1380668291. The reversal of 1380668273 is 3728660831.

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 716472289 + 664195984 = 26767^2 + 25772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380668273 - 2⁴ = 1380668257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380668203) 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, 480308 + ... + 483173.

It is an arithmetic number, because the mean of its divisors is an integer number (345408297).

Almost surely, 2^1380668273 is an apocalyptic number.

It is an amenable number.

1380668273 is a deficient number, since it is larger than the sum of its proper divisors (964915).

1380668273 is an equidigital number, since it uses as much as digits as its factorization.

1380668273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964914.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 1380668273 is about 37157.3448055697. The cubic root of 1380668273 is about 1113.5159657025.

The spelling of 1380668273 in words is "one billion, three hundred eighty million, six hundred sixty-eight thousand, two hundred seventy-three".