206969961 has 8 divisors (see below), whose sum is σ = 301047264. Its totient is φ = 125436320.

The previous prime is 206969957. The next prime is 206969989. The reversal of 206969961 is 169969602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206969961 - 2² = 206969957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206969961.

It is not an unprimeable number, because it can be changed into a prime (206969921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3135876 + ... + 3135941.

It is an arithmetic number, because the mean of its divisors is an integer number (37630908).

Almost surely, 2^206969961 is an apocalyptic number.

It is an amenable number.

206969961 is a deficient number, since it is larger than the sum of its proper divisors (94077303).

206969961 is a wasteful number, since it uses less digits than its factorization.

206969961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6271831.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 206969961 is about 14386.4506046488. The cubic root of 206969961 is about 591.5195542292.

The spelling of 206969961 in words is "two hundred six million, nine hundred sixty-nine thousand, nine hundred sixty-one".