133377791 has 2 divisors, whose sum is σ = 133377792. Its totient is φ = 133377790.

The previous prime is 133377773. The next prime is 133377793. The reversal of 133377791 is 197773331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133377791 - 2²⁶ = 66268927 is a prime.

Together with 133377793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133377793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66688895 + 66688896.

It is an arithmetic number, because the mean of its divisors is an integer number (66688896).

Almost surely, 2^133377791 is an apocalyptic number.

133377791 is a deficient number, since it is larger than the sum of its proper divisors (1).

133377791 is an equidigital number, since it uses as much as digits as its factorization.

133377791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83349, while the sum is 41.

The square root of 133377791 is about 11548.9302967851. The cubic root of 133377791 is about 510.9297291682.

The spelling of 133377791 in words is "one hundred thirty-three million, three hundred seventy-seven thousand, seven hundred ninety-one".