109071666493 has 2 divisors, whose sum is σ = 109071666494. Its totient is φ = 109071666492.

The previous prime is 109071666479. The next prime is 109071666499. The reversal of 109071666493 is 394666170901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98707815684 + 10363850809 = 314178^2 + 101803^2 .

It is a cyclic number.

It is not a de Polignac number, because 109071666493 - 2²⁵ = 109038112061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109071666493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109071666499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54535833246 + 54535833247.

It is an arithmetic number, because the mean of its divisors is an integer number (54535833247).

Almost surely, 2^109071666493 is an apocalyptic number.

It is an amenable number.

109071666493 is a deficient number, since it is larger than the sum of its proper divisors (1).

109071666493 is an equidigital number, since it uses as much as digits as its factorization.

109071666493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The spelling of 109071666493 in words is "one hundred nine billion, seventy-one million, six hundred sixty-six thousand, four hundred ninety-three".