206157069 has 12 divisors (see below), whose sum is σ = 308811776. Its totient is φ = 137437884.

The previous prime is 206157053. The next prime is 206157097. The reversal of 206157069 is 960751602.

206157069 is a `hidden beast` number, since 20 + 6 + 1 + 570 + 69 = 666.

It is not a de Polignac number, because 206157069 - 2⁴ = 206157053 is a prime.

It is a super-2 number, since 2×206157069² = 85001474197341522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206157769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423949 + ... + 424434.

Almost surely, 2^206157069 is an apocalyptic number.

It is an amenable number.

206157069 is a deficient number, since it is larger than the sum of its proper divisors (102654707).

206157069 is an frugal number, since it uses more digits than its factorization.

206157069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848398 (or 848386 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 206157069 is about 14358.1708096819. The cubic root of 206157069 is about 590.7441238180.

The spelling of 206157069 in words is "two hundred six million, one hundred fifty-seven thousand, sixty-nine".