206967687989 has 8 divisors (see below), whose sum is σ = 215555234688. Its totient is φ = 198537711120.

The previous prime is 206967687973. The next prime is 206967688019. The reversal of 206967687989 is 989786769602.

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 206967687989 - 2⁴ = 206967687973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206967687959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39389777 + ... + 39395030.

It is an arithmetic number, because the mean of its divisors is an integer number (26944404336).

Almost surely, 2^206967687989 is an apocalyptic number.

It is an amenable number.

206967687989 is a deficient number, since it is larger than the sum of its proper divisors (8587546699).

206967687989 is an equidigital number, since it uses as much as digits as its factorization.

206967687989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78784915.

The product of its (nonzero) digits is 987614208, while the sum is 77.

The spelling of 206967687989 in words is "two hundred six billion, nine hundred sixty-seven million, six hundred eighty-seven thousand, nine hundred eighty-nine".