206997650 has 24 divisors (see below), whose sum is σ = 398294820. Its totient is φ = 79943360.

The previous prime is 206997641. The next prime is 206997667. The reversal of 206997650 is 56799602.

It can be written as a sum of positive squares in 6 ways, for example, as 50822641 + 156175009 = 7129^2 + 12497^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69929 + ... + 72828.

Almost surely, 2^206997650 is an apocalyptic number.

206997650 is a deficient number, since it is larger than the sum of its proper divisors (191297170).

206997650 is a wasteful number, since it uses less digits than its factorization.

206997650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142798 (or 142793 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 206997650 is about 14387.4129015609. The cubic root of 206997650 is about 591.5459314138.

The spelling of 206997650 in words is "two hundred six million, nine hundred ninety-seven thousand, six hundred fifty".