206920047 has 4 divisors (see below), whose sum is σ = 275893400. Its totient is φ = 137946696.

The previous prime is 206920037. The next prime is 206920081. The reversal of 206920047 is 740029602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 206920047 - 2⁴ = 206920031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206919996 and 206920023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206920027) 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, 34486672 + ... + 34486677.

It is an arithmetic number, because the mean of its divisors is an integer number (68973350).

Almost surely, 2^206920047 is an apocalyptic number.

206920047 is a deficient number, since it is larger than the sum of its proper divisors (68973353).

206920047 is an equidigital number, since it uses as much as digits as its factorization.

206920047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68973352.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 206920047 is about 14384.7157427597. The cubic root of 206920047 is about 591.4719990499.

Adding to 206920047 its reverse (740029602), we get a palindrome (946949649).

The spelling of 206920047 in words is "two hundred six million, nine hundred twenty thousand, forty-seven".