206945973 has 48 divisors (see below), whose sum is σ = 342486144. Its totient is φ = 119433600.

The previous prime is 206945969. The next prime is 206945989. The reversal of 206945973 is 379549602.

It is a happy number.

It is not a de Polignac number, because 206945973 - 2² = 206945969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206945933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 141898 + ... + 143348.

It is an arithmetic number, because the mean of its divisors is an integer number (7135128).

Almost surely, 2^206945973 is an apocalyptic number.

206945973 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

206945973 is a deficient number, since it is larger than the sum of its proper divisors (135540171).

206945973 is a wasteful number, since it uses less digits than its factorization.

206945973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546 (or 1543 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 206945973 is about 14385.6168793695. The cubic root of 206945973 is about 591.4967008012.

The spelling of 206945973 in words is "two hundred six million, nine hundred forty-five thousand, nine hundred seventy-three".