206545723 has 2 divisors, whose sum is σ = 206545724. Its totient is φ = 206545722.

The previous prime is 206545693. The next prime is 206545739. The reversal of 206545723 is 327545602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206545723 - 2²¹ = 204448571 is a prime.

It is a super-2 number, since 2×206545723² = 85322271379185458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206545753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103272861 + 103272862.

It is an arithmetic number, because the mean of its divisors is an integer number (103272862).

Almost surely, 2^206545723 is an apocalyptic number.

206545723 is a deficient number, since it is larger than the sum of its proper divisors (1).

206545723 is an equidigital number, since it uses as much as digits as its factorization.

206545723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 206545723 is about 14371.6986817843. The cubic root of 206545723 is about 591.1151207779.

The spelling of 206545723 in words is "two hundred six million, five hundred forty-five thousand, seven hundred twenty-three".