193920949 has 2 divisors, whose sum is σ = 193920950. Its totient is φ = 193920948.

The previous prime is 193920931. The next prime is 193920953. The reversal of 193920949 is 949029391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158004900 + 35916049 = 12570^2 + 5993^2 .

It is a cyclic number.

It is not a de Polignac number, because 193920949 - 2⁵ = 193920917 is a prime.

It is a super-2 number, since 2×193920949² = 75210668922121202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 193920899 and 193920908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193920929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96960474 + 96960475.

It is an arithmetic number, because the mean of its divisors is an integer number (96960475).

Almost surely, 2^193920949 is an apocalyptic number.

It is an amenable number.

193920949 is a deficient number, since it is larger than the sum of its proper divisors (1).

193920949 is an equidigital number, since it uses as much as digits as its factorization.

193920949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 193920949 is about 13925.5502225226. The cubic root of 193920949 is about 578.8173971241.

The spelling of 193920949 in words is "one hundred ninety-three million, nine hundred twenty thousand, nine hundred forty-nine".