211009393 has 8 divisors (see below), whose sum is σ = 241287488. Its totient is φ = 180764784.

The previous prime is 211009369. The next prime is 211009397. The reversal of 211009393 is 393900112.

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 211009393 - 2⁵ = 211009361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211009397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7030 + ... + 21712.

It is an arithmetic number, because the mean of its divisors is an integer number (30160936).

Almost surely, 2^211009393 is an apocalyptic number.

It is an amenable number.

211009393 is a deficient number, since it is larger than the sum of its proper divisors (30278095).

211009393 is a wasteful number, since it uses less digits than its factorization.

211009393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16743.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 211009393 is about 14526.1623631295. The cubic root of 211009393 is about 595.3430152649.

The spelling of 211009393 in words is "two hundred eleven million, nine thousand, three hundred ninety-three".