1376565889 has 2 divisors, whose sum is σ = 1376565890. Its totient is φ = 1376565888.

The previous prime is 1376565809. The next prime is 1376565913. The reversal of 1376565889 is 9885656731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1373443600 + 3122289 = 37060^2 + 1767^2 .

It is an emirp because it is prime and its reverse (9885656731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1376565889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1376565809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688282944 + 688282945.

It is an arithmetic number, because the mean of its divisors is an integer number (688282945).

Almost surely, 2^1376565889 is an apocalyptic number.

It is an amenable number.

1376565889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376565889 is an equidigital number, since it uses as much as digits as its factorization.

1376565889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10886400, while the sum is 58.

The square root of 1376565889 is about 37102.1008704359. The cubic root of 1376565889 is about 1112.4120070790.

The spelling of 1376565889 in words is "one billion, three hundred seventy-six million, five hundred sixty-five thousand, eight hundred eighty-nine".