206157023 has 2 divisors, whose sum is σ = 206157024. Its totient is φ = 206157022.

The previous prime is 206157013. The next prime is 206157047. The reversal of 206157023 is 320751602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206157023 - 2⁶ = 206156959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206156983 and 206157001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206157013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103078511 + 103078512.

It is an arithmetic number, because the mean of its divisors is an integer number (103078512).

Almost surely, 2^206157023 is an apocalyptic number.

206157023 is a deficient number, since it is larger than the sum of its proper divisors (1).

206157023 is an equidigital number, since it uses as much as digits as its factorization.

206157023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 206157023 is about 14358.1692078064. The cubic root of 206157023 is about 590.7440798802.

The spelling of 206157023 in words is "two hundred six million, one hundred fifty-seven thousand, twenty-three".