243406193 has 8 divisors (see below), whose sum is σ = 251997480. Its totient is φ = 234828160.

The previous prime is 243406183. The next prime is 243406213. The reversal of 243406193 is 391604342.

It can be written as a sum of positive squares in 4 ways, for example, as 39287824 + 204118369 = 6268^2 + 14287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243406193 - 2⁶ = 243406129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243406103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47471 + ... + 52347.

It is an arithmetic number, because the mean of its divisors is an integer number (31499685).

Almost surely, 2^243406193 is an apocalyptic number.

It is an amenable number.

243406193 is a deficient number, since it is larger than the sum of its proper divisors (8591287).

243406193 is a wasteful number, since it uses less digits than its factorization.

243406193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6627.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 243406193 is about 15601.4804746216. The cubic root of 243406193 is about 624.3726552056.

The spelling of 243406193 in words is "two hundred forty-three million, four hundred six thousand, one hundred ninety-three".