1909164309893 has 2 divisors, whose sum is σ = 1909164309894. Its totient is φ = 1909164309892.

The previous prime is 1909164309863. The next prime is 1909164309917. The reversal of 1909164309893 is 3989034619091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1397083812289 + 512080497604 = 1181983^2 + 715598^2 .

It is a cyclic number.

It is not a de Polignac number, because 1909164309893 - 2²⁶ = 1909097201029 is a prime.

It is a super-4 number, since 4×1909164309893⁴ (a number of 50 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1909164309863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 954582154946 + 954582154947.

It is an arithmetic number, because the mean of its divisors is an integer number (954582154947).

Almost surely, 2^{1909164309893} is an apocalyptic number.

It is an amenable number.

1909164309893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1909164309893 is an equidigital number, since it uses as much as digits as its factorization.

1909164309893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11337408, while the sum is 62.

The spelling of 1909164309893 in words is "one trillion, nine hundred nine billion, one hundred sixty-four million, three hundred nine thousand, eight hundred ninety-three".