135784823 has 2 divisors, whose sum is σ = 135784824. Its totient is φ = 135784822.

The previous prime is 135784741. The next prime is 135784829. The reversal of 135784823 is 328487531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135784823 - 2¹⁴ = 135768439 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135784829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67892411 + 67892412.

It is an arithmetic number, because the mean of its divisors is an integer number (67892412).

Almost surely, 2^135784823 is an apocalyptic number.

135784823 is a deficient number, since it is larger than the sum of its proper divisors (1).

135784823 is an equidigital number, since it uses as much as digits as its factorization.

135784823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 135784823 is about 11652.6744998734. The cubic root of 135784823 is about 513.9849589587.

The spelling of 135784823 in words is "one hundred thirty-five million, seven hundred eighty-four thousand, eight hundred twenty-three".