206887426 has 4 divisors (see below), whose sum is σ = 310331142. Its totient is φ = 103443712.

The previous prime is 206887423. The next prime is 206887427. The reversal of 206887426 is 624788602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 179586801 + 27300625 = 13401^2 + 5225^2 .

It is not an unprimeable number, because it can be changed into a prime (206887423) by changing a digit.

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 as a sum of consecutive naturals, namely, 51721855 + ... + 51721858.

Almost surely, 2^206887426 is an apocalyptic number.

206887426 is a deficient number, since it is larger than the sum of its proper divisors (103443716).

206887426 is a wasteful number, since it uses less digits than its factorization.

206887426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103443715.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 206887426 is about 14383.5818209513. The cubic root of 206887426 is about 591.4409155108.

The spelling of 206887426 in words is "two hundred six million, eight hundred eighty-seven thousand, four hundred twenty-six".