1375726273 has 4 divisors (see below), whose sum is σ = 1423165140. Its totient is φ = 1328287408.

The previous prime is 1375726249. The next prime is 1375726279. The reversal of 1375726273 is 3726275731.

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 1042773264 + 332953009 = 32292^2 + 18247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375726273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1375726279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23719390 + ... + 23719447.

It is an arithmetic number, because the mean of its divisors is an integer number (355791285).

Almost surely, 2^1375726273 is an apocalyptic number.

It is an amenable number.

1375726273 is a deficient number, since it is larger than the sum of its proper divisors (47438867).

1375726273 is an equidigital number, since it uses as much as digits as its factorization.

1375726273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47438866.

The product of its digits is 370440, while the sum is 43.

The square root of 1375726273 is about 37090.7842057835. The cubic root of 1375726273 is about 1112.1857946653.

The spelling of 1375726273 in words is "one billion, three hundred seventy-five million, seven hundred twenty-six thousand, two hundred seventy-three".