206172953 has 8 divisors (see below), whose sum is σ = 236744640. Its totient is φ = 175880880.

The previous prime is 206172931. The next prime is 206172983. The reversal of 206172953 is 359271602.

206172953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 206172953 - 2²⁴ = 189395737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (206172983) 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, 68318 + ... + 71271.

It is an arithmetic number, because the mean of its divisors is an integer number (29593080).

Almost surely, 2^206172953 is an apocalyptic number.

It is an amenable number.

206172953 is a deficient number, since it is larger than the sum of its proper divisors (30571687).

206172953 is a wasteful number, since it uses less digits than its factorization.

206172953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139807.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 206172953 is about 14358.7239335534. The cubic root of 206172953 is about 590.7592953224.

The spelling of 206172953 in words is "two hundred six million, one hundred seventy-two thousand, nine hundred fifty-three".