206993471 has 8 divisors (see below), whose sum is σ = 212789664. Its totient is φ = 201277440.

The previous prime is 206993459. The next prime is 206993477. The reversal of 206993471 is 174399602.

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 206993471 - 2⁶ = 206993407 is a prime.

It is a super-3 number, since 3×206993471³ (a number of 26 digits) contains 333 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 (206993477) 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, 14786 + ... + 25151.

It is an arithmetic number, because the mean of its divisors is an integer number (26598708).

Almost surely, 2^206993471 is an apocalyptic number.

206993471 is a deficient number, since it is larger than the sum of its proper divisors (5796193).

206993471 is an equidigital number, since it uses as much as digits as its factorization.

206993471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40081.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 206993471 is about 14387.2676697141. The cubic root of 206993471 is about 591.5419505520.

The spelling of 206993471 in words is "two hundred six million, nine hundred ninety-three thousand, four hundred seventy-one".