195019 has 4 divisors (see below), whose sum is σ = 212760. Its totient is φ = 177280.

The previous prime is 194989. The next prime is 195023. The reversal of 195019 is 910591.

195019 = T₁₂₂ + T₁₂₃ + ... + T₁₄₃.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910591 = 11 ⋅82781.

It is a cyclic number.

It is not a de Polignac number, because 195019 - 2⁷ = 194891 is a prime.

It is a super-2 number, since 2×195019² = 76064820722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194984 and 195002.

It is not an unprimeable number, because it can be changed into a prime (195029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8854 + ... + 8875.

It is an arithmetic number, because the mean of its divisors is an integer number (53190).

2¹⁹⁵⁰¹⁹ is an apocalyptic number.

195019 is a deficient number, since it is larger than the sum of its proper divisors (17741).

195019 is a wasteful number, since it uses less digits than its factorization.

195019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17740.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 195019 is about 441.6095560560. The cubic root of 195019 is about 57.9907833155.

The spelling of 195019 in words is "one hundred ninety-five thousand, nineteen".