133749841 has 8 divisors (see below), whose sum is σ = 138288384. Its totient is φ = 129225360.

The previous prime is 133749809. The next prime is 133749859. The reversal of 133749841 is 148947331.

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

It is not a de Polignac number, because 133749841 - 2⁵ = 133749809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133749794 and 133749803.

It is not an unprimeable number, because it can be changed into a prime (133749541) 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, 18015 + ... + 24331.

It is an arithmetic number, because the mean of its divisors is an integer number (17286048).

Almost surely, 2^133749841 is an apocalyptic number.

It is an amenable number.

133749841 is a deficient number, since it is larger than the sum of its proper divisors (4538543).

133749841 is an equidigital number, since it uses as much as digits as its factorization.

133749841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7031.

The product of its digits is 72576, while the sum is 40.

The square root of 133749841 is about 11565.0266320489. The cubic root of 133749841 is about 511.4043582347.

The spelling of 133749841 in words is "one hundred thirty-three million, seven hundred forty-nine thousand, eight hundred forty-one".