1378801273 has 4 divisors (see below), whose sum is σ = 1378986868. Its totient is φ = 1378615680.

The previous prime is 1378801271. The next prime is 1378801313. The reversal of 1378801273 is 3721088731.

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 1184254569 + 194546704 = 34413^2 + 13948^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378801273 - 2¹ = 1378801271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378801271) 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 in 3 ways as a sum of consecutive naturals, for example, 81168 + ... + 96673.

It is an arithmetic number, because the mean of its divisors is an integer number (344746717).

Almost surely, 2^1378801273 is an apocalyptic number.

It is an amenable number.

1378801273 is a deficient number, since it is larger than the sum of its proper divisors (185595).

1378801273 is an equidigital number, since it uses as much as digits as its factorization.

1378801273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185594.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 1378801273 is about 37132.2134136924. The cubic root of 1378801273 is about 1113.0138243051.

The spelling of 1378801273 in words is "one billion, three hundred seventy-eight million, eight hundred one thousand, two hundred seventy-three".