493979109161 has 2 divisors, whose sum is σ = 493979109162. Its totient is φ = 493979109160.

The previous prime is 493979109109. The next prime is 493979109187. The reversal of 493979109161 is 161901979394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278724867136 + 215254242025 = 527944^2 + 463955^2 .

It is a cyclic number.

It is not a de Polignac number, because 493979109161 - 2¹⁴ = 493979092777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 493979109161.

It is not a weakly prime, because it can be changed into another prime (493979109361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246989554580 + 246989554581.

It is an arithmetic number, because the mean of its divisors is an integer number (246989554581).

Almost surely, 2^493979109161 is an apocalyptic number.

It is an amenable number.

493979109161 is a deficient number, since it is larger than the sum of its proper divisors (1).

493979109161 is an equidigital number, since it uses as much as digits as its factorization.

493979109161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3306744, while the sum is 59.

The spelling of 493979109161 in words is "four hundred ninety-three billion, nine hundred seventy-nine million, one hundred nine thousand, one hundred sixty-one".