1373003623861 has 2 divisors, whose sum is σ = 1373003623862. Its totient is φ = 1373003623860.

The previous prime is 1373003623847. The next prime is 1373003623877. The reversal of 1373003623861 is 1683263003731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1351755022500 + 21248601361 = 1162650^2 + 145769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1373003623861 is a prime.

It is a super-2 number, since 2×1373003623861² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1373003623841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686501811930 + 686501811931.

It is an arithmetic number, because the mean of its divisors is an integer number (686501811931).

Almost surely, 2^{1373003623861} is an apocalyptic number.

It is an amenable number.

1373003623861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373003623861 is an equidigital number, since it uses as much as digits as its factorization.

1373003623861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 1373003623861 in words is "one trillion, three hundred seventy-three billion, three million, six hundred twenty-three thousand, eight hundred sixty-one".