193669939313 has 2 divisors, whose sum is σ = 193669939314. Its totient is φ = 193669939312.

The previous prime is 193669939277. The next prime is 193669939373. The reversal of 193669939313 is 313939966391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160262507584 + 33407431729 = 400328^2 + 182777^2 .

It is a cyclic number.

It is not a de Polignac number, because 193669939313 - 2⁶ = 193669939249 is a prime.

It is a super-2 number, since 2×193669939313² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (193669939373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96834969656 + 96834969657.

It is an arithmetic number, because the mean of its divisors is an integer number (96834969657).

Almost surely, 2^193669939313 is an apocalyptic number.

It is an amenable number.

193669939313 is a deficient number, since it is larger than the sum of its proper divisors (1).

193669939313 is an equidigital number, since it uses as much as digits as its factorization.

193669939313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19131876, while the sum is 62.

The spelling of 193669939313 in words is "one hundred ninety-three billion, six hundred sixty-nine million, nine hundred thirty-nine thousand, three hundred thirteen".