193305421 has 4 divisors (see below), whose sum is σ = 194135292. Its totient is φ = 192475552.

The previous prime is 193305389. The next prime is 193305433. The reversal of 193305421 is 124503391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32649796 + 160655625 = 5714^2 + 12675^2 .

It is a cyclic number.

It is not a de Polignac number, because 193305421 - 2⁵ = 193305389 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 193305421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193305481) 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, 414586 + ... + 415051.

It is an arithmetic number, because the mean of its divisors is an integer number (48533823).

Almost surely, 2^193305421 is an apocalyptic number.

It is an amenable number.

193305421 is a deficient number, since it is larger than the sum of its proper divisors (829871).

193305421 is an equidigital number, since it uses as much as digits as its factorization.

193305421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829870.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 193305421 is about 13903.4319863838. The cubic root of 193305421 is about 578.2043364255.

The spelling of 193305421 in words is "one hundred ninety-three million, three hundred five thousand, four hundred twenty-one".