1376820073 has 2 divisors, whose sum is σ = 1376820074. Its totient is φ = 1376820072.

The previous prime is 1376820023. The next prime is 1376820079. The reversal of 1376820073 is 3700286731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1116094464 + 260725609 = 33408^2 + 16147^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376820073 - 2¹⁷ = 1376689001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1376820079) 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, 688410036 + 688410037.

It is an arithmetic number, because the mean of its divisors is an integer number (688410037).

Almost surely, 2^1376820073 is an apocalyptic number.

It is an amenable number.

1376820073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376820073 is an equidigital number, since it uses as much as digits as its factorization.

1376820073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 1376820073 is about 37105.5261787244. The cubic root of 1376820073 is about 1112.4804721228.

The spelling of 1376820073 in words is "one billion, three hundred seventy-six million, eight hundred twenty thousand, seventy-three".