1897368502493 has 2 divisors, whose sum is σ = 1897368502494. Its totient is φ = 1897368502492.

The previous prime is 1897368502411. The next prime is 1897368502507. The reversal of 1897368502493 is 3942058637981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1004489026564 + 892879475929 = 1002242^2 + 944923^2 .

It is a cyclic number.

It is not a de Polignac number, because 1897368502493 - 2³⁰ = 1896294760669 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1897368502693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948684251246 + 948684251247.

It is an arithmetic number, because the mean of its divisors is an integer number (948684251247).

It is a 1-persistent number, because it is pandigital, but 2⋅1897368502493 = 3794737004986 is not.

Almost surely, 2^{1897368502493} is an apocalyptic number.

It is an amenable number.

1897368502493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1897368502493 is an equidigital number, since it uses as much as digits as its factorization.

1897368502493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 1897368502493 in words is "one trillion, eight hundred ninety-seven billion, three hundred sixty-eight million, five hundred two thousand, four hundred ninety-three".