16347921773 has 2 divisors, whose sum is σ = 16347921774. Its totient is φ = 16347921772.

The previous prime is 16347921763. The next prime is 16347921787. The reversal of 16347921773 is 37712974361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9970621609 + 6377300164 = 99853^2 + 79858^2 .

It is an emirp because it is prime and its reverse (37712974361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16347921773 - 2⁴ = 16347921757 is a prime.

It is a super-2 number, since 2×16347921773² (a number of 21 digits) contains 22 as substring.

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 (16347921713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8173960886 + 8173960887.

It is an arithmetic number, because the mean of its divisors is an integer number (8173960887).

Almost surely, 2^16347921773 is an apocalyptic number.

It is an amenable number.

16347921773 is a deficient number, since it is larger than the sum of its proper divisors (1).

16347921773 is an equidigital number, since it uses as much as digits as its factorization.

16347921773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 50.

The spelling of 16347921773 in words is "sixteen billion, three hundred forty-seven million, nine hundred twenty-one thousand, seven hundred seventy-three".