133681453 has 8 divisors (see below), whose sum is σ = 137193408. Its totient is φ = 130187904.

The previous prime is 133681447. The next prime is 133681477. The reversal of 133681453 is 354186331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133681453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133681153) 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, 10776 + ... + 19582.

It is an arithmetic number, because the mean of its divisors is an integer number (17149176).

Almost surely, 2^133681453 is an apocalyptic number.

It is an amenable number.

133681453 is a deficient number, since it is larger than the sum of its proper divisors (3511955).

133681453 is an equidigital number, since it uses as much as digits as its factorization.

133681453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9203.

The product of its digits is 25920, while the sum is 34.

The square root of 133681453 is about 11562.0695811779. The cubic root of 133681453 is about 511.3171808506.

The spelling of 133681453 in words is "one hundred thirty-three million, six hundred eighty-one thousand, four hundred fifty-three".