206070989 has 4 divisors (see below), whose sum is σ = 208553856. Its totient is φ = 203588124.

The previous prime is 206070973. The next prime is 206071009. The reversal of 206070989 is 989070602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206070989 - 2⁴ = 206070973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206070289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1241309 + ... + 1241474.

It is an arithmetic number, because the mean of its divisors is an integer number (52138464).

Almost surely, 2^206070989 is an apocalyptic number.

It is an amenable number.

206070989 is a deficient number, since it is larger than the sum of its proper divisors (2482867).

206070989 is an equidigital number, since it uses as much as digits as its factorization.

206070989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482866.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 206070989 is about 14355.1729003868. The cubic root of 206070989 is about 590.6618914799.

The spelling of 206070989 in words is "two hundred six million, seventy thousand, nine hundred eighty-nine".