133031779 has 2 divisors, whose sum is σ = 133031780. Its totient is φ = 133031778.

The previous prime is 133031737. The next prime is 133031807. The reversal of 133031779 is 977130331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133031779 - 2⁷ = 133031651 is a prime.

It is equal to p_7540297 and since 133031779 and 7540297 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (133031279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66515889 + 66515890.

It is an arithmetic number, because the mean of its divisors is an integer number (66515890).

Almost surely, 2^133031779 is an apocalyptic number.

133031779 is a deficient number, since it is larger than the sum of its proper divisors (1).

133031779 is an equidigital number, since it uses as much as digits as its factorization.

133031779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11907, while the sum is 34.

The square root of 133031779 is about 11533.9403067642. The cubic root of 133031779 is about 510.4875243288.

The spelling of 133031779 in words is "one hundred thirty-three million, thirty-one thousand, seven hundred seventy-nine".