133727761 has 2 divisors, whose sum is σ = 133727762. Its totient is φ = 133727760.

The previous prime is 133727753. The next prime is 133727821. The reversal of 133727761 is 167727331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132687361 + 1040400 = 11519^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 133727761 - 2³ = 133727753 is a prime.

It is a super-2 number, since 2×133727761² = 35766228124146242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133727761.

It is not a weakly prime, because it can be changed into another prime (133727161) 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 as a sum of consecutive naturals, namely, 66863880 + 66863881.

It is an arithmetic number, because the mean of its divisors is an integer number (66863881).

Almost surely, 2^133727761 is an apocalyptic number.

It is an amenable number.

133727761 is a deficient number, since it is larger than the sum of its proper divisors (1).

133727761 is an equidigital number, since it uses as much as digits as its factorization.

133727761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37044, while the sum is 37.

The square root of 133727761 is about 11564.0719904366. The cubic root of 133727761 is about 511.3762150744.

The spelling of 133727761 in words is "one hundred thirty-three million, seven hundred twenty-seven thousand, seven hundred sixty-one".