1377113729 has 2 divisors, whose sum is σ = 1377113730. Its totient is φ = 1377113728.

The previous prime is 1377113723. The next prime is 1377113737. The reversal of 1377113729 is 9273117731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1335537025 + 41576704 = 36545^2 + 6448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377113729 is a prime.

It is a super-4 number, since 4×1377113729⁴ (a number of 38 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1377113723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688556864 + 688556865.

It is an arithmetic number, because the mean of its divisors is an integer number (688556865).

Almost surely, 2^1377113729 is an apocalyptic number.

It is an amenable number.

1377113729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377113729 is an equidigital number, since it uses as much as digits as its factorization.

1377113729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55566, while the sum is 41.

The square root of 1377113729 is about 37109.4830063691. The cubic root of 1377113729 is about 1112.5595585503.

The spelling of 1377113729 in words is "one billion, three hundred seventy-seven million, one hundred thirteen thousand, seven hundred twenty-nine".