190771209 has 12 divisors (see below), whose sum is σ = 275698800. Its totient is φ = 127116024.

The previous prime is 190771187. The next prime is 190771211. The reversal of 190771209 is 902177091.

190771209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 190771209 - 2⁷ = 190771081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190771409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19102 + ... + 27320.

It is an arithmetic number, because the mean of its divisors is an integer number (22974900).

Almost surely, 2^190771209 is an apocalyptic number.

It is an amenable number.

190771209 is a deficient number, since it is larger than the sum of its proper divisors (84927591).

190771209 is a wasteful number, since it uses less digits than its factorization.

190771209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10804 (or 10801 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 190771209 is about 13811.9951129444. The cubic root of 190771209 is about 575.6664826319. Note that the first 3 decimals are identical.

The spelling of 190771209 in words is "one hundred ninety million, seven hundred seventy-one thousand, two hundred nine".