133407779 has 2 divisors, whose sum is σ = 133407780. Its totient is φ = 133407778.

The previous prime is 133407737. The next prime is 133407817. The reversal of 133407779 is 977704331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133407779 is a prime.

It is not a weakly prime, because it can be changed into another prime (133407979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66703889 + 66703890.

It is an arithmetic number, because the mean of its divisors is an integer number (66703890).

Almost surely, 2^133407779 is an apocalyptic number.

133407779 is a deficient number, since it is larger than the sum of its proper divisors (1).

133407779 is an equidigital number, since it uses as much as digits as its factorization.

133407779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 111132, while the sum is 41.

The square root of 133407779 is about 11550.2285258777. The cubic root of 133407779 is about 510.9680179329.

The spelling of 133407779 in words is "one hundred thirty-three million, four hundred seven thousand, seven hundred seventy-nine".