133640915 has 8 divisors (see below), whose sum is σ = 161330400. Its totient is φ = 106271872.

The previous prime is 133640909. The next prime is 133640917. The reversal of 133640915 is 519046331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133640915 - 2¹⁴ = 133624531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133640917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79190 + ... + 80859.

It is an arithmetic number, because the mean of its divisors is an integer number (20166300).

Almost surely, 2^133640915 is an apocalyptic number.

133640915 is a deficient number, since it is larger than the sum of its proper divisors (27689485).

133640915 is a wasteful number, since it uses less digits than its factorization.

133640915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160221.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 133640915 is about 11560.3163884039. The cubic root of 133640915 is about 511.2654911286.

The spelling of 133640915 in words is "one hundred thirty-three million, six hundred forty thousand, nine hundred fifteen".