206887423 has 2 divisors, whose sum is σ = 206887424. Its totient is φ = 206887422.

The previous prime is 206887403. The next prime is 206887427. The reversal of 206887423 is 324788602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206887423 - 2⁵ = 206887391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206887427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103443711 + 103443712.

It is an arithmetic number, because the mean of its divisors is an integer number (103443712).

Almost surely, 2^206887423 is an apocalyptic number.

206887423 is a deficient number, since it is larger than the sum of its proper divisors (1).

206887423 is an equidigital number, since it uses as much as digits as its factorization.

206887423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 206887423 is about 14383.5817166657. The cubic root of 206887423 is about 591.4409126520.

The spelling of 206887423 in words is "two hundred six million, eight hundred eighty-seven thousand, four hundred twenty-three".