133853915 has 12 divisors (see below), whose sum is σ = 173931984. Its totient is φ = 98845344.

The previous prime is 133853911. The next prime is 133853927. The reversal of 133853915 is 519358331.

It is not a de Polignac number, because 133853915 - 2² = 133853911 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133853911) 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 11 ways as a sum of consecutive naturals, for example, 78359 + ... + 80048.

It is an arithmetic number, because the mean of its divisors is an integer number (14494332).

Almost surely, 2^133853915 is an apocalyptic number.

133853915 is a deficient number, since it is larger than the sum of its proper divisors (40078069).

133853915 is a wasteful number, since it uses less digits than its factorization.

133853915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158438 (or 158425 counting only the distinct ones).

The product of its digits is 48600, while the sum is 38.

The square root of 133853915 is about 11569.5252711596. The cubic root of 133853915 is about 511.5369692290.

The spelling of 133853915 in words is "one hundred thirty-three million, eight hundred fifty-three thousand, nine hundred fifteen".