206670047 has 4 divisors (see below), whose sum is σ = 206808336. Its totient is φ = 206531760.

The previous prime is 206670041. The next prime is 206670059. The reversal of 206670047 is 740076602.

It is a happy number.

206670047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740076602 = 2 ⋅370038301.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206670047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206669995 and 206670022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206670041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66878 + ... + 69899.

It is an arithmetic number, because the mean of its divisors is an integer number (51702084).

Almost surely, 2^206670047 is an apocalyptic number.

206670047 is a deficient number, since it is larger than the sum of its proper divisors (138289).

206670047 is a wasteful number, since it uses less digits than its factorization.

206670047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138288.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 206670047 is about 14376.0233374880. The cubic root of 206670047 is about 591.2336983260.

The spelling of 206670047 in words is "two hundred six million, six hundred seventy thousand, forty-seven".