133446779 has 2 divisors, whose sum is σ = 133446780. Its totient is φ = 133446778.

The previous prime is 133446769. The next prime is 133446791. The reversal of 133446779 is 977644331.

It is a weak prime.

It is an emirp because it is prime and its reverse (977644331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133446779 - 2⁴ = 133446763 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (133446749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66723389 + 66723390.

It is an arithmetic number, because the mean of its divisors is an integer number (66723390).

Almost surely, 2^133446779 is an apocalyptic number.

133446779 is a deficient number, since it is larger than the sum of its proper divisors (1).

133446779 is an equidigital number, since it uses as much as digits as its factorization.

133446779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 44.

The square root of 133446779 is about 11551.9166807937. The cubic root of 133446779 is about 511.0178046627.

The spelling of 133446779 in words is "one hundred thirty-three million, four hundred forty-six thousand, seven hundred seventy-nine".