206290291 has 8 divisors (see below), whose sum is σ = 220147200. Its totient is φ = 192624768.

The previous prime is 206290283. The next prime is 206290297. The reversal of 206290291 is 192092602.

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 206290291 - 2³ = 206290283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206290297) 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, 45616 + ... + 49933.

It is an arithmetic number, because the mean of its divisors is an integer number (27518400).

Almost surely, 2^206290291 is an apocalyptic number.

206290291 is a deficient number, since it is larger than the sum of its proper divisors (13856909).

206290291 is a wasteful number, since it uses less digits than its factorization.

206290291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95693.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 206290291 is about 14362.8093004119. The cubic root of 206290291 is about 590.8713458558.

The spelling of 206290291 in words is "two hundred six million, two hundred ninety thousand, two hundred ninety-one".