190971 has 16 divisors (see below), whose sum is σ = 309120. Its totient is φ = 115560.

The previous prime is 190921. The next prime is 190979. The reversal of 190971 is 179091.

It is not a de Polignac number, because 190971 - 2⁷ = 190843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (190979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25 + ... + 618.

It is an arithmetic number, because the mean of its divisors is an integer number (19320).

2¹⁹⁰⁹⁷¹ is an apocalyptic number.

190971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

190971 is a deficient number, since it is larger than the sum of its proper divisors (118149).

190971 is a wasteful number, since it uses less digits than its factorization.

190971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The square root of 190971 is about 437.0022883235. The cubic root of 190971 is about 57.5867373979.

The spelling of 190971 in words is "one hundred ninety thousand, nine hundred seventy-one".