206506123 has 8 divisors (see below), whose sum is σ = 221650128. Its totient is φ = 191695104.

The previous prime is 206506099. The next prime is 206506141. The reversal of 206506123 is 321605602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206506123 is a prime.

It is a super-2 number, since 2×206506123² = 85289557672982258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206506723) 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, 81961 + ... + 84442.

It is an arithmetic number, because the mean of its divisors is an integer number (27706266).

Almost surely, 2^206506123 is an apocalyptic number.

206506123 is a deficient number, since it is larger than the sum of its proper divisors (15144005).

206506123 is a wasteful number, since it uses less digits than its factorization.

206506123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166493.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 206506123 is about 14370.3209080382. The cubic root of 206506123 is about 591.0773411609.

The spelling of 206506123 in words is "two hundred six million, five hundred six thousand, one hundred twenty-three".