135590639 has 2 divisors, whose sum is σ = 135590640. Its totient is φ = 135590638.

The previous prime is 135590591. The next prime is 135590641. The reversal of 135590639 is 936095531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135590639 is a prime.

Together with 135590641, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 135590596 and 135590605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135593639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67795319 + 67795320.

It is an arithmetic number, because the mean of its divisors is an integer number (67795320).

Almost surely, 2^135590639 is an apocalyptic number.

135590639 is a deficient number, since it is larger than the sum of its proper divisors (1).

135590639 is an equidigital number, since it uses as much as digits as its factorization.

135590639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109350, while the sum is 41.

The square root of 135590639 is about 11644.3393543816. The cubic root of 135590639 is about 513.7398278050.

The spelling of 135590639 in words is "one hundred thirty-five million, five hundred ninety thousand, six hundred thirty-nine".