133865163 has 8 divisors (see below), whose sum is σ = 198318800. Its totient is φ = 89243424.

The previous prime is 133865117. The next prime is 133865231. The reversal of 133865163 is 361568331.

It is a happy number.

133865163 is a `hidden beast` number, since 133 + 8 + 6 + 516 + 3 = 666.

It is not a de Polignac number, because 133865163 - 2¹⁴ = 133848779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133861163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2478958 + ... + 2479011.

It is an arithmetic number, because the mean of its divisors is an integer number (24789850).

Almost surely, 2^133865163 is an apocalyptic number.

133865163 is a deficient number, since it is larger than the sum of its proper divisors (64453637).

133865163 is an equidigital number, since it uses as much as digits as its factorization.

133865163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4957978 (or 4957972 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 133865163 is about 11570.0113655951. The cubic root of 133865163 is about 511.5512973037.

The spelling of 133865163 in words is "one hundred thirty-three million, eight hundred sixty-five thousand, one hundred sixty-three".