206959138 has 32 divisors (see below), whose sum is σ = 329313600. Its totient is φ = 97401024.

The previous prime is 206959133. The next prime is 206959141. The reversal of 206959138 is 831959602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 206959094 and 206959103.

It is not an unprimeable number, because it can be changed into a prime (206959133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673981 + ... + 674287.

It is an arithmetic number, because the mean of its divisors is an integer number (10291050).

Almost surely, 2^206959138 is an apocalyptic number.

206959138 is a deficient number, since it is larger than the sum of its proper divisors (122354462).

206959138 is a wasteful number, since it uses less digits than its factorization.

206959138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 206959138 is about 14386.0744471868. The cubic root of 206959138 is about 591.5092433485.

The spelling of 206959138 in words is "two hundred six million, nine hundred fifty-nine thousand, one hundred thirty-eight".