193923949 has 2 divisors, whose sum is σ = 193923950. Its totient is φ = 193923948.

The previous prime is 193923869. The next prime is 193923953. The reversal of 193923949 is 949329391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112148100 + 81775849 = 10590^2 + 9043^2 .

It is a cyclic number.

It is not a de Polignac number, because 193923949 - 2²¹ = 191826797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193920949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96961974 + 96961975.

It is an arithmetic number, because the mean of its divisors is an integer number (96961975).

Almost surely, 2^193923949 is an apocalyptic number.

It is an amenable number.

193923949 is a deficient number, since it is larger than the sum of its proper divisors (1).

193923949 is an equidigital number, since it uses as much as digits as its factorization.

193923949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472392, while the sum is 49.

The square root of 193923949 is about 13925.6579377780. The cubic root of 193923949 is about 578.8203819198.

The spelling of 193923949 in words is "one hundred ninety-three million, nine hundred twenty-three thousand, nine hundred forty-nine".