193304921 has 2 divisors, whose sum is σ = 193304922. Its totient is φ = 193304920.

The previous prime is 193304897. The next prime is 193304927. The reversal of 193304921 is 129403391.

193304921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190136521 + 3168400 = 13789^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 193304921 - 2¹⁰ = 193303897 is a prime.

It is not a weakly prime, because it can be changed into another prime (193304927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96652460 + 96652461.

It is an arithmetic number, because the mean of its divisors is an integer number (96652461).

Almost surely, 2^193304921 is an apocalyptic number.

It is an amenable number.

193304921 is a deficient number, since it is larger than the sum of its proper divisors (1).

193304921 is an equidigital number, since it uses as much as digits as its factorization.

193304921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 193304921 is about 13903.4140052003. The cubic root of 193304921 is about 578.2038379011.

The spelling of 193304921 in words is "one hundred ninety-three million, three hundred four thousand, nine hundred twenty-one".