206439154 has 8 divisors (see below), whose sum is σ = 310944348. Its totient is φ = 102791040.

The previous prime is 206439097. The next prime is 206439203. The reversal of 206439154 is 451934602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 199798225 + 6640929 = 14135^2 + 2577^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213667 + ... + 214630.

Almost surely, 2^206439154 is an apocalyptic number.

206439154 is a deficient number, since it is larger than the sum of its proper divisors (104505194).

206439154 is a wasteful number, since it uses less digits than its factorization.

206439154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428540.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 206439154 is about 14367.9906041172. The cubic root of 206439154 is about 591.0134396849.

The spelling of 206439154 in words is "two hundred six million, four hundred thirty-nine thousand, one hundred fifty-four".