1397430559873 has 2 divisors, whose sum is σ = 1397430559874. Its totient is φ = 1397430559872.

The previous prime is 1397430559823. The next prime is 1397430559927. The reversal of 1397430559873 is 3789550347931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1347751499329 + 49679060544 = 1160927^2 + 222888^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397430559873 - 2³³ = 1388840625281 is a prime.

It is a super-2 number, since 2×1397430559873² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1397430559823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698715279936 + 698715279937.

It is an arithmetic number, because the mean of its divisors is an integer number (698715279937).

Almost surely, 2^{1397430559873} is an apocalyptic number.

It is an amenable number.

1397430559873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397430559873 is an equidigital number, since it uses as much as digits as its factorization.

1397430559873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 85730400, while the sum is 64.

The spelling of 1397430559873 in words is "one trillion, three hundred ninety-seven billion, four hundred thirty million, five hundred fifty-nine thousand, eight hundred seventy-three".