16975319693 has 4 divisors (see below), whose sum is σ = 16978591260. Its totient is φ = 16972048128.

The previous prime is 16975319657. The next prime is 16975319719. The reversal of 16975319693 is 39691357961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39691357961 = 23977 ⋅1655393.

It can be written as a sum of positive squares in 2 ways, for example, as 11751210409 + 5224109284 = 108403^2 + 72278^2 .

It is a cyclic number.

It is not a de Polignac number, because 16975319693 - 2⁸ = 16975319437 is a prime.

It is a super-2 number, since 2×16975319693² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16975319653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1627988 + ... + 1638381.

It is an arithmetic number, because the mean of its divisors is an integer number (4244647815).

Almost surely, 2^16975319693 is an apocalyptic number.

It is an amenable number.

16975319693 is a deficient number, since it is larger than the sum of its proper divisors (3271567).

16975319693 is an equidigital number, since it uses as much as digits as its factorization.

16975319693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271566.

The product of its digits is 8266860, while the sum is 59.

The spelling of 16975319693 in words is "sixteen billion, nine hundred seventy-five million, three hundred nineteen thousand, six hundred ninety-three".