206272470389 has 4 divisors (see below), whose sum is σ = 206633718720. Its totient is φ = 205911222060.

The previous prime is 206272470337. The next prime is 206272470407. The reversal of 206272470389 is 983074272602.

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 a de Polignac number, because none of the positive numbers 2^k-206272470389 is a prime.

It is a super-2 number, since 2×206272470389² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206272473389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180623309 + ... + 180624450.

It is an arithmetic number, because the mean of its divisors is an integer number (51658429680).

Almost surely, 2^206272470389 is an apocalyptic number.

It is an amenable number.

206272470389 is a deficient number, since it is larger than the sum of its proper divisors (361248331).

206272470389 is an equidigital number, since it uses as much as digits as its factorization.

206272470389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361248330.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 206272470389 in words is "two hundred six billion, two hundred seventy-two million, four hundred seventy thousand, three hundred eighty-nine".