135909643 has 2 divisors, whose sum is σ = 135909644. Its totient is φ = 135909642.

The previous prime is 135909619. The next prime is 135909659. The reversal of 135909643 is 346909531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135909643 - 2¹⁷ = 135778571 is a prime.

It is equal to p_7693915 and since 135909643 and 7693915 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 135909596 and 135909605.

It is not a weakly prime, because it can be changed into another prime (135909743) 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, 67954821 + 67954822.

It is an arithmetic number, because the mean of its divisors is an integer number (67954822).

Almost surely, 2^135909643 is an apocalyptic number.

135909643 is a deficient number, since it is larger than the sum of its proper divisors (1).

135909643 is an equidigital number, since it uses as much as digits as its factorization.

135909643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 135909643 is about 11658.0291215968. The cubic root of 135909643 is about 514.1424040322.

The spelling of 135909643 in words is "one hundred thirty-five million, nine hundred nine thousand, six hundred forty-three".