206129437 has 8 divisors (see below), whose sum is σ = 218538432. Its totient is φ = 193752000.

The previous prime is 206129411. The next prime is 206129449. The reversal of 206129437 is 734921602.

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 206129437 - 2²⁷ = 71911709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206120437) 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, 6312 + ... + 21262.

It is an arithmetic number, because the mean of its divisors is an integer number (27317304).

Almost surely, 2^206129437 is an apocalyptic number.

It is an amenable number.

206129437 is a deficient number, since it is larger than the sum of its proper divisors (12408995).

206129437 is a wasteful number, since it uses less digits than its factorization.

206129437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15779.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 206129437 is about 14357.2085378739. The cubic root of 206129437 is about 590.7177294268.

The spelling of 206129437 in words is "two hundred six million, one hundred twenty-nine thousand, four hundred thirty-seven".