1377345757 has 4 divisors (see below), whose sum is σ = 1414571356. Its totient is φ = 1340120160.

The previous prime is 1377345743. The next prime is 1377345769. The reversal of 1377345757 is 7575437731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7575437731 = 19 ⋅398707249.

It can be written as a sum of positive squares in 2 ways, for example, as 1162400836 + 214944921 = 34094^2 + 14661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377345757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1377345757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377375757) 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, 18612744 + ... + 18612817.

It is an arithmetic number, because the mean of its divisors is an integer number (353642839).

Almost surely, 2^1377345757 is an apocalyptic number.

It is an amenable number.

1377345757 is a deficient number, since it is larger than the sum of its proper divisors (37225599).

1377345757 is an equidigital number, since it uses as much as digits as its factorization.

1377345757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37225598.

The product of its digits is 2160900, while the sum is 49.

The square root of 1377345757 is about 37112.6091375963. The cubic root of 1377345757 is about 1112.6220395851.

The spelling of 1377345757 in words is "one billion, three hundred seventy-seven million, three hundred forty-five thousand, seven hundred fifty-seven".