190505923 has 2 divisors, whose sum is σ = 190505924. Its totient is φ = 190505922.

The previous prime is 190505873. The next prime is 190505947. The reversal of 190505923 is 329505091.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 190505923 - 2⁹ = 190505411 is a prime.

It is not a weakly prime, because it can be changed into another prime (190535923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95252961 + 95252962.

It is an arithmetic number, because the mean of its divisors is an integer number (95252962).

Almost surely, 2^190505923 is an apocalyptic number.

190505923 is a deficient number, since it is larger than the sum of its proper divisors (1).

190505923 is an equidigital number, since it uses as much as digits as its factorization.

190505923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 190505923 is about 13802.3883078256. The cubic root of 190505923 is about 575.3995186894.

The spelling of 190505923 in words is "one hundred ninety million, five hundred five thousand, nine hundred twenty-three".