1376820017 has 2 divisors, whose sum is σ = 1376820018. Its totient is φ = 1376820016.

The previous prime is 1376819999. The next prime is 1376820023. The reversal of 1376820017 is 7100286731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1326707776 + 50112241 = 36424^2 + 7079^2 .

It is an emirp because it is prime and its reverse (7100286731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1376820017 - 2¹⁸ = 1376557873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1376825017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688410008 + 688410009.

It is an arithmetic number, because the mean of its divisors is an integer number (688410009).

Almost surely, 2^1376820017 is an apocalyptic number.

It is an amenable number.

1376820017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376820017 is an equidigital number, since it uses as much as digits as its factorization.

1376820017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 1376820017 is about 37105.5254241198. The cubic root of 1376820017 is about 1112.4804570400.

The spelling of 1376820017 in words is "one billion, three hundred seventy-six million, eight hundred twenty thousand, seventeen".