206157047 has 2 divisors, whose sum is σ = 206157048. Its totient is φ = 206157046.

The previous prime is 206157023. The next prime is 206157053. The reversal of 206157047 is 740751602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206157047 - 2⁸ = 206156791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206157097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103078523 + 103078524.

It is an arithmetic number, because the mean of its divisors is an integer number (103078524).

Almost surely, 2^206157047 is an apocalyptic number.

206157047 is a deficient number, since it is larger than the sum of its proper divisors (1).

206157047 is an equidigital number, since it uses as much as digits as its factorization.

206157047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 206157047 is about 14358.1700435675. The cubic root of 206157047 is about 590.7441028043.

The spelling of 206157047 in words is "two hundred six million, one hundred fifty-seven thousand, forty-seven".