190945 has 4 divisors (see below), whose sum is σ = 229140. Its totient is φ = 152752.

The previous prime is 190921. The next prime is 190979. The reversal of 190945 is 549091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40401 + 150544 = 201^2 + 388^2 .

It is a cyclic number.

It is not a de Polignac number, because 190945 - 2⁵ = 190913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19090 + ... + 19099.

It is an arithmetic number, because the mean of its divisors is an integer number (57285).

2¹⁹⁰⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

190945 is a deficient number, since it is larger than the sum of its proper divisors (38195).

190945 is an equidigital number, since it uses as much as digits as its factorization.

190945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38194.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 190945 is about 436.9725391830. The cubic root of 190945 is about 57.5841238717.

It can be divided in two parts, 1909 and 45, that multiplied together give a triangular number (85905 = T₄₁₄).

The spelling of 190945 in words is "one hundred ninety thousand, nine hundred forty-five".