238191019 has 4 divisors (see below), whose sum is σ = 259844760. Its totient is φ = 216537280.

The previous prime is 238191001. The next prime is 238191053. The reversal of 238191019 is 910191832.

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

It is a cyclic number.

It is not a de Polignac number, because 238191019 - 2⁵ = 238190987 is a prime.

It is a super-2 number, since 2×238191019² = 113469923064516722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238191119) 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 3 ways as a sum of consecutive naturals, for example, 10826854 + ... + 10826875.

It is an arithmetic number, because the mean of its divisors is an integer number (64961190).

Almost surely, 2^238191019 is an apocalyptic number.

238191019 is a deficient number, since it is larger than the sum of its proper divisors (21653741).

238191019 is a wasteful number, since it uses less digits than its factorization.

238191019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21653740.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 238191019 is about 15433.4383401755. The cubic root of 238191019 is about 619.8811938501.

The spelling of 238191019 in words is "two hundred thirty-eight million, one hundred ninety-one thousand, nineteen".