193120261 has 4 divisors (see below), whose sum is σ = 193279392. Its totient is φ = 192961132.

The previous prime is 193120247. The next prime is 193120271. The reversal of 193120261 is 162021391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 193120261 - 2¹¹ = 193118213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193120271) 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, 77731 + ... + 80176.

It is an arithmetic number, because the mean of its divisors is an integer number (48319848).

Almost surely, 2^193120261 is an apocalyptic number.

It is an amenable number.

193120261 is a deficient number, since it is larger than the sum of its proper divisors (159131).

193120261 is a wasteful number, since it uses less digits than its factorization.

193120261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159130.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 193120261 is about 13896.7716035056. The cubic root of 193120261 is about 578.0196640461.

The spelling of 193120261 in words is "one hundred ninety-three million, one hundred twenty thousand, two hundred sixty-one".