193665049 has 4 divisors (see below), whose sum is σ = 193741236. Its totient is φ = 193588864.

The previous prime is 193665011. The next prime is 193665061. The reversal of 193665049 is 940566391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 940566391 = 43 ⋅21873637.

It can be written as a sum of positive squares in 2 ways, for example, as 56025225 + 137639824 = 7485^2 + 11732^2 .

It is a cyclic number.

It is not a de Polignac number, because 193665049 - 2⁷ = 193664921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 193664996 and 193665014.

It is not an unprimeable number, because it can be changed into a prime (193665149) 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, 34144 + ... + 39409.

It is an arithmetic number, because the mean of its divisors is an integer number (48435309).

Almost surely, 2^193665049 is an apocalyptic number.

It is an amenable number.

193665049 is a deficient number, since it is larger than the sum of its proper divisors (76187).

193665049 is an equidigital number, since it uses as much as digits as its factorization.

193665049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76186.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 193665049 is about 13916.3590425082. The cubic root of 193665049 is about 578.5626806641.

The spelling of 193665049 in words is "one hundred ninety-three million, six hundred sixty-five thousand, forty-nine".