193825921 has 2 divisors, whose sum is σ = 193825922. Its totient is φ = 193825920.

The previous prime is 193825861. The next prime is 193825927. The reversal of 193825921 is 129528391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192904321 + 921600 = 13889^2 + 960^2 .

It is an emirp because it is prime and its reverse (129528391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 193825921 - 2¹⁵ = 193793153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (193825927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96912960 + 96912961.

It is an arithmetic number, because the mean of its divisors is an integer number (96912961).

Almost surely, 2^193825921 is an apocalyptic number.

It is an amenable number.

193825921 is a deficient number, since it is larger than the sum of its proper divisors (1).

193825921 is an equidigital number, since it uses as much as digits as its factorization.

193825921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 193825921 is about 13922.1378027945. The cubic root of 193825921 is about 578.7228348004.

The spelling of 193825921 in words is "one hundred ninety-three million, eight hundred twenty-five thousand, nine hundred twenty-one".