42830191 has 4 divisors (see below), whose sum is σ = 45349632. Its totient is φ = 40310752.

The previous prime is 42830167. The next prime is 42830197. The reversal of 42830191 is 19103824.

It is a happy number.

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 42830191 - 2⁵ = 42830159 is a prime.

It is a super-2 number, since 2×42830191² = 3668850522192962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42830197) 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, 1259695 + ... + 1259728.

It is an arithmetic number, because the mean of its divisors is an integer number (11337408).

Almost surely, 2^42830191 is an apocalyptic number.

42830191 is a deficient number, since it is larger than the sum of its proper divisors (2519441).

42830191 is a wasteful number, since it uses less digits than its factorization.

42830191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519440.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 42830191 is about 6544.4779012539. The cubic root of 42830191 is about 349.8780282472.

The spelling of 42830191 in words is "forty-two million, eight hundred thirty thousand, one hundred ninety-one".