133478387932691 has 2 divisors, whose sum is σ = 133478387932692. Its totient is φ = 133478387932690.

The previous prime is 133478387932667. The next prime is 133478387932709. The reversal of 133478387932691 is 196239783874331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133478387932691 - 2⁴² = 129080341421587 is a prime.

It is not a weakly prime, because it can be changed into another prime (133478387932601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66739193966345 + 66739193966346.

It is an arithmetic number, because the mean of its divisors is an integer number (66739193966346).

Almost surely, 2^{133478387932691} is an apocalyptic number.

133478387932691 is a deficient number, since it is larger than the sum of its proper divisors (1).

133478387932691 is an equidigital number, since it uses as much as digits as its factorization.

133478387932691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987614208, while the sum is 74.

The spelling of 133478387932691 in words is "one hundred thirty-three trillion, four hundred seventy-eight billion, three hundred eighty-seven million, nine hundred thirty-two thousand, six hundred ninety-one".