193516659493 has 2 divisors, whose sum is σ = 193516659494. Its totient is φ = 193516659492.

The previous prime is 193516659449. The next prime is 193516659509. The reversal of 193516659493 is 394956615391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184626621124 + 8890038369 = 429682^2 + 94287^2 .

It is a cyclic number.

It is not a de Polignac number, because 193516659493 - 2¹³ = 193516651301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193516656493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96758329746 + 96758329747.

It is an arithmetic number, because the mean of its divisors is an integer number (96758329747).

Almost surely, 2^193516659493 is an apocalyptic number.

It is an amenable number.

193516659493 is a deficient number, since it is larger than the sum of its proper divisors (1).

193516659493 is an equidigital number, since it uses as much as digits as its factorization.

193516659493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23619600, while the sum is 61.

The spelling of 193516659493 in words is "one hundred ninety-three billion, five hundred sixteen million, six hundred fifty-nine thousand, four hundred ninety-three".