1376809897 has 2 divisors, whose sum is σ = 1376809898. Its totient is φ = 1376809896.

The previous prime is 1376809891. The next prime is 1376809927. The reversal of 1376809897 is 7989086731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1034522896 + 342287001 = 32164^2 + 18501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1376809897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1376809891) 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 as a sum of consecutive naturals, namely, 688404948 + 688404949.

It is an arithmetic number, because the mean of its divisors is an integer number (688404949).

Almost surely, 2^1376809897 is an apocalyptic number.

It is an amenable number.

1376809897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376809897 is an equidigital number, since it uses as much as digits as its factorization.

1376809897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The square root of 1376809897 is about 37105.3890560387. The cubic root of 1376809897 is about 1112.4777313558.

The spelling of 1376809897 in words is "one billion, three hundred seventy-six million, eight hundred nine thousand, eight hundred ninety-seven".