135331979 has 2 divisors, whose sum is σ = 135331980. Its totient is φ = 135331978.

The previous prime is 135331969. The next prime is 135331997. The reversal of 135331979 is 979133531.

Together with next prime (135331997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135331979 - 2⁸ = 135331723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135331909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67665989 + 67665990.

It is an arithmetic number, because the mean of its divisors is an integer number (67665990).

Almost surely, 2^135331979 is an apocalyptic number.

135331979 is a deficient number, since it is larger than the sum of its proper divisors (1).

135331979 is an equidigital number, since it uses as much as digits as its factorization.

135331979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76545, while the sum is 41.

The square root of 135331979 is about 11633.2273681898. The cubic root of 135331979 is about 513.4129406065.

The spelling of 135331979 in words is "one hundred thirty-five million, three hundred thirty-one thousand, nine hundred seventy-nine".