1377275717 has 4 divisors (see below), whose sum is σ = 1382990796. Its totient is φ = 1371560640.

The previous prime is 1377275707. The next prime is 1377275747. The reversal of 1377275717 is 7175727731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7175727731 = 1217 ⋅5896243.

It can be written as a sum of positive squares in 2 ways, for example, as 1189284196 + 187991521 = 34486^2 + 13711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377275717 - 2⁸ = 1377275461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377275707) 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, 2857178 + ... + 2857659.

It is an arithmetic number, because the mean of its divisors is an integer number (345747699).

Almost surely, 2^1377275717 is an apocalyptic number.

It is an amenable number.

1377275717 is a deficient number, since it is larger than the sum of its proper divisors (5715079).

1377275717 is an equidigital number, since it uses as much as digits as its factorization.

1377275717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5715078.

The product of its digits is 504210, while the sum is 47.

The square root of 1377275717 is about 37111.6655109953. The cubic root of 1377275717 is about 1112.6031797918.

The spelling of 1377275717 in words is "one billion, three hundred seventy-seven million, two hundred seventy-five thousand, seven hundred seventeen".