135939673 has 2 divisors, whose sum is σ = 135939674. Its totient is φ = 135939672.

The previous prime is 135939613. The next prime is 135939707. The reversal of 135939673 is 376939531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135769104 + 170569 = 11652^2 + 413^2 .

It is a cyclic number.

It is not a de Polignac number, because 135939673 - 2⁹ = 135939161 is a prime.

It is not a weakly prime, because it can be changed into another prime (135939613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67969836 + 67969837.

It is an arithmetic number, because the mean of its divisors is an integer number (67969837).

Almost surely, 2^135939673 is an apocalyptic number.

It is an amenable number.

135939673 is a deficient number, since it is larger than the sum of its proper divisors (1).

135939673 is an equidigital number, since it uses as much as digits as its factorization.

135939673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 459270, while the sum is 46.

The square root of 135939673 is about 11659.3170040101. The cubic root of 135939673 is about 514.1802687954.

The spelling of 135939673 in words is "one hundred thirty-five million, nine hundred thirty-nine thousand, six hundred seventy-three".