427238193 has 4 divisors (see below), whose sum is σ = 569650928. Its totient is φ = 284825460.

The previous prime is 427238191. The next prime is 427238209. The reversal of 427238193 is 391832724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 427238193 - 2¹ = 427238191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427238191) 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, 71206363 + ... + 71206368.

It is an arithmetic number, because the mean of its divisors is an integer number (142412732).

Almost surely, 2^427238193 is an apocalyptic number.

It is an amenable number.

427238193 is a deficient number, since it is larger than the sum of its proper divisors (142412735).

427238193 is a wasteful number, since it uses less digits than its factorization.

427238193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142412734.

The product of its digits is 72576, while the sum is 39.

The square root of 427238193 is about 20669.7409998287. The cubic root of 427238193 is about 753.1648149219.

The spelling of 427238193 in words is "four hundred twenty-seven million, two hundred thirty-eight thousand, one hundred ninety-three".