206623873 has 8 divisors (see below), whose sum is σ = 212662592. Its totient is φ = 200609136.

The previous prime is 206623861. The next prime is 206623877. The reversal of 206623873 is 378326602.

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

It is a 2-Lehmer number, since φ(206623873) divides (206623873-1)².

It is a cyclic number.

It is not a de Polignac number, because 206623873 - 2¹³ = 206615681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206623877) 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, 12286 + ... + 23752.

It is an arithmetic number, because the mean of its divisors is an integer number (26582824).

It is a Poulet number, since it divides 2^206623872-1.

Almost surely, 2^206623873 is an apocalyptic number.

It is an amenable number.

206623873 is a deficient number, since it is larger than the sum of its proper divisors (6038719).

206623873 is a wasteful number, since it uses less digits than its factorization.

206623873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11991.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 206623873 is about 14374.4173099295. The cubic root of 206623873 is about 591.1896641138.

The spelling of 206623873 in words is "two hundred six million, six hundred twenty-three thousand, eight hundred seventy-three".