200906681 has 4 divisors (see below), whose sum is σ = 201238272. Its totient is φ = 200575092.

The previous prime is 200906677. The next prime is 200906687. The reversal of 200906681 is 186609002.

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 200906681 - 2² = 200906677 is a prime.

It is a super-2 number, since 2×200906681² = 80726988940871522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200906687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164885 + ... + 166098.

It is an arithmetic number, because the mean of its divisors is an integer number (50309568).

Almost surely, 2^200906681 is an apocalyptic number.

It is an amenable number.

200906681 is a deficient number, since it is larger than the sum of its proper divisors (331591).

200906681 is an equidigital number, since it uses as much as digits as its factorization.

200906681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331590.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 200906681 is about 14174.1553892992. The cubic root of 200906681 is about 585.6859326889.

The spelling of 200906681 in words is "two hundred million, nine hundred six thousand, six hundred eighty-one".