133737473 has 4 divisors (see below), whose sum is σ = 138349140. Its totient is φ = 129125808.

The previous prime is 133737413. The next prime is 133737491. The reversal of 133737473 is 374737331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39589264 + 94148209 = 6292^2 + 9703^2 .

It is a cyclic number.

It is not a de Polignac number, because 133737473 - 2⁸ = 133737217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133737413) 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 3 ways as a sum of consecutive naturals, for example, 2305790 + ... + 2305847.

It is an arithmetic number, because the mean of its divisors is an integer number (34587285).

Almost surely, 2^133737473 is an apocalyptic number.

It is an amenable number.

133737473 is a deficient number, since it is larger than the sum of its proper divisors (4611667).

133737473 is an equidigital number, since it uses as much as digits as its factorization.

133737473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4611666.

The product of its digits is 111132, while the sum is 38.

The square root of 133737473 is about 11564.4919041002. The cubic root of 133737473 is about 511.3885943678.

The spelling of 133737473 in words is "one hundred thirty-three million, seven hundred thirty-seven thousand, four hundred seventy-three".