206172983 has 2 divisors, whose sum is σ = 206172984. Its totient is φ = 206172982.

The previous prime is 206172931. The next prime is 206173007. The reversal of 206172983 is 389271602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206172983 - 2¹⁸ = 205910839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206172283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103086491 + 103086492.

It is an arithmetic number, because the mean of its divisors is an integer number (103086492).

Almost surely, 2^206172983 is an apocalyptic number.

206172983 is a deficient number, since it is larger than the sum of its proper divisors (1).

206172983 is an equidigital number, since it uses as much as digits as its factorization.

206172983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 206172983 is about 14358.7249782145. The cubic root of 206172983 is about 590.7593239760.

The spelling of 206172983 in words is "two hundred six million, one hundred seventy-two thousand, nine hundred eighty-three".