133774531691 has 2 divisors, whose sum is σ = 133774531692. Its totient is φ = 133774531690.

The previous prime is 133774531619. The next prime is 133774531699. The reversal of 133774531691 is 196135477331.

Together with previous prime (133774531619) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133774531691 - 2¹⁰ = 133774530667 is a prime.

It is not a weakly prime, because it can be changed into another prime (133774531699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66887265845 + 66887265846.

It is an arithmetic number, because the mean of its divisors is an integer number (66887265846).

Almost surely, 2^133774531691 is an apocalyptic number.

133774531691 is a deficient number, since it is larger than the sum of its proper divisors (1).

133774531691 is an equidigital number, since it uses as much as digits as its factorization.

133774531691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 50.

The spelling of 133774531691 in words is "one hundred thirty-three billion, seven hundred seventy-four million, five hundred thirty-one thousand, six hundred ninety-one".