133478791 has 2 divisors, whose sum is σ = 133478792. Its totient is φ = 133478790.

The previous prime is 133478789. The next prime is 133478801. The reversal of 133478791 is 197874331.

It is a weak prime.

It is an emirp because it is prime and its reverse (197874331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133478791 - 2¹ = 133478789 is a prime.

Together with 133478789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133478701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66739395 + 66739396.

It is an arithmetic number, because the mean of its divisors is an integer number (66739396).

Almost surely, 2^133478791 is an apocalyptic number.

133478791 is a deficient number, since it is larger than the sum of its proper divisors (1).

133478791 is an equidigital number, since it uses as much as digits as its factorization.

133478791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 133478791 is about 11553.3021686443. The cubic root of 133478791 is about 511.0586633836.

The spelling of 133478791 in words is "one hundred thirty-three million, four hundred seventy-eight thousand, seven hundred ninety-one".