1377131273 has 4 divisors (see below), whose sum is σ = 1573864320. Its totient is φ = 1180398228.

The previous prime is 1377131251. The next prime is 1377131299. The reversal of 1377131273 is 3721317731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1377131273 - 2⁶ = 1377131209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1377131573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98366513 + ... + 98366526.

It is an arithmetic number, because the mean of its divisors is an integer number (393466080).

Almost surely, 2^1377131273 is an apocalyptic number.

It is an amenable number.

1377131273 is a deficient number, since it is larger than the sum of its proper divisors (196733047).

1377131273 is an equidigital number, since it uses as much as digits as its factorization.

1377131273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196733046.

The product of its digits is 18522, while the sum is 35.

The square root of 1377131273 is about 37109.7193872441. The cubic root of 1377131273 is about 1112.5642830843.

The spelling of 1377131273 in words is "one billion, three hundred seventy-seven million, one hundred thirty-one thousand, two hundred seventy-three".