1377896161 has 2 divisors, whose sum is σ = 1377896162. Its totient is φ = 1377896160.

The previous prime is 1377896159. The next prime is 1377896249. The reversal of 1377896161 is 1616987731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1376781025 + 1115136 = 37105^2 + 1056^2 .

It is an emirp because it is prime and its reverse (1616987731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377896161 - 2¹ = 1377896159 is a prime.

Together with 1377896159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1377896101) 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, 688948080 + 688948081.

It is an arithmetic number, because the mean of its divisors is an integer number (688948081).

Almost surely, 2^1377896161 is an apocalyptic number.

It is an amenable number.

1377896161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377896161 is an equidigital number, since it uses as much as digits as its factorization.

1377896161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 49.

The square root of 1377896161 is about 37120.0237203588. The cubic root of 1377896161 is about 1112.7702255829.

The spelling of 1377896161 in words is "one billion, three hundred seventy-seven million, eight hundred ninety-six thousand, one hundred sixty-one".