133971505 has 8 divisors (see below), whose sum is σ = 161457192. Its totient is φ = 106716288.

The previous prime is 133971469. The next prime is 133971511. The reversal of 133971505 is 505179331.

It can be written as a sum of positive squares in 4 ways, for example, as 152881 + 133818624 = 391^2 + 11568^2 .

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 133971505 - 2¹⁹ = 133447217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56334 + ... + 58663.

It is an arithmetic number, because the mean of its divisors is an integer number (20182149).

Almost surely, 2^133971505 is an apocalyptic number.

It is an amenable number.

133971505 is a deficient number, since it is larger than the sum of its proper divisors (27485687).

133971505 is a wasteful number, since it uses less digits than its factorization.

133971505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115235.

The product of its (nonzero) digits is 14175, while the sum is 34.

The square root of 133971505 is about 11574.6060408119. The cubic root of 133971505 is about 511.6867196155.

The spelling of 133971505 in words is "one hundred thirty-three million, nine hundred seventy-one thousand, five hundred five".