190985923 has 2 divisors, whose sum is σ = 190985924. Its totient is φ = 190985922.

The previous prime is 190985807. The next prime is 190985969. The reversal of 190985923 is 329589091.

190985923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (190985969) can be obtained adding 190985923 to its sum of digits (46).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190985923 is a prime.

It is not a weakly prime, because it can be changed into another prime (190985623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95492961 + 95492962.

It is an arithmetic number, because the mean of its divisors is an integer number (95492962).

Almost surely, 2^190985923 is an apocalyptic number.

190985923 is a deficient number, since it is larger than the sum of its proper divisors (1).

190985923 is an equidigital number, since it uses as much as digits as its factorization.

190985923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 190985923 is about 13819.7656637151. The cubic root of 190985923 is about 575.8823735422.

The spelling of 190985923 in words is "one hundred ninety million, nine hundred eighty-five thousand, nine hundred twenty-three".