193030091 has 8 divisors (see below), whose sum is σ = 197920800. Its totient is φ = 188148160.

The previous prime is 193030069. The next prime is 193030093. The reversal of 193030091 is 190030391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 193030091 - 2⁶ = 193030027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 193030091.

It is not an unprimeable number, because it can be changed into a prime (193030093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82445 + ... + 84753.

It is an arithmetic number, because the mean of its divisors is an integer number (24740100).

Almost surely, 2^193030091 is an apocalyptic number.

193030091 is a deficient number, since it is larger than the sum of its proper divisors (4890709).

193030091 is a wasteful number, since it uses less digits than its factorization.

193030091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4389.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 193030091 is about 13893.5269460278. The cubic root of 193030091 is about 577.9296887689.

It can be divided in two parts, 1930300 and 91, that added together give a palindrome (1930391).

The spelling of 193030091 in words is "one hundred ninety-three million, thirty thousand, ninety-one".