133449747 has 8 divisors (see below), whose sum is σ = 178369680. Its totient is φ = 88748160.

The previous prime is 133449739. The next prime is 133449773. The reversal of 133449747 is 747944331.

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

It is not a de Polignac number, because 133449747 - 2³ = 133449739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133449699 and 133449708.

It is not an unprimeable number, because it can be changed into a prime (133449347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53154 + ... + 55607.

It is an arithmetic number, because the mean of its divisors is an integer number (22296210).

Almost surely, 2^133449747 is an apocalyptic number.

133449747 is a deficient number, since it is larger than the sum of its proper divisors (44919933).

133449747 is a wasteful number, since it uses less digits than its factorization.

133449747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109173.

The product of its digits is 254016, while the sum is 42.

The square root of 133449747 is about 11552.0451436099. The cubic root of 133449747 is about 511.0215931633.

The spelling of 133449747 in words is "one hundred thirty-three million, four hundred forty-nine thousand, seven hundred forty-seven".