133316761 has 4 divisors (see below), whose sum is σ = 135143092. Its totient is φ = 131490432.

The previous prime is 133316753. The next prime is 133316779. The reversal of 133316761 is 167613331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167613331 = 241 ⋅695491.

It can be written as a sum of positive squares in 2 ways, for example, as 71301136 + 62015625 = 8444^2 + 7875^2 .

It is a cyclic number.

It is not a de Polignac number, because 133316761 - 2³ = 133316753 is a prime.

It is a super-2 number, since 2×133316761² = 35546717527062242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133316791) 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, 913056 + ... + 913201.

It is an arithmetic number, because the mean of its divisors is an integer number (33785773).

Almost surely, 2^133316761 is an apocalyptic number.

It is an amenable number.

133316761 is a deficient number, since it is larger than the sum of its proper divisors (1826331).

133316761 is an equidigital number, since it uses as much as digits as its factorization.

133316761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826330.

The product of its digits is 6804, while the sum is 31.

The square root of 133316761 is about 11546.2877584096. The cubic root of 133316761 is about 510.8517881598.

The spelling of 133316761 in words is "one hundred thirty-three million, three hundred sixteen thousand, seven hundred sixty-one".