193638061 has 2 divisors, whose sum is σ = 193638062. Its totient is φ = 193638060.

The previous prime is 193638047. The next prime is 193638077. The reversal of 193638061 is 160836391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188375625 + 5262436 = 13725^2 + 2294^2 .

It is a cyclic number.

It is not a de Polignac number, because 193638061 - 2⁷ = 193637933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 193638061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193638031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96819030 + 96819031.

It is an arithmetic number, because the mean of its divisors is an integer number (96819031).

Almost surely, 2^193638061 is an apocalyptic number.

It is an amenable number.

193638061 is a deficient number, since it is larger than the sum of its proper divisors (1).

193638061 is an equidigital number, since it uses as much as digits as its factorization.

193638061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 193638061 is about 13915.3893585483. The cubic root of 193638061 is about 578.5358044069.

The spelling of 193638061 in words is "one hundred ninety-three million, six hundred thirty-eight thousand, sixty-one".