135423919 has 2 divisors, whose sum is σ = 135423920. Its totient is φ = 135423918.

The previous prime is 135423917. The next prime is 135423923. The reversal of 135423919 is 919324531.

135423919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (919324531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135423919 - 2¹ = 135423917 is a prime.

It is a super-2 number, since 2×135423919² = 36679275674637122, which contains 22 as substring.

Together with 135423917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135423917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67711959 + 67711960.

It is an arithmetic number, because the mean of its divisors is an integer number (67711960).

Almost surely, 2^135423919 is an apocalyptic number.

135423919 is a deficient number, since it is larger than the sum of its proper divisors (1).

135423919 is an equidigital number, since it uses as much as digits as its factorization.

135423919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 135423919 is about 11637.1783091951. The cubic root of 135423919 is about 513.5291794554.

It can be divided in two parts, 13542391 and 9, that added together give a square (13542400 = 3680²).

The spelling of 135423919 in words is "one hundred thirty-five million, four hundred twenty-three thousand, nine hundred nineteen".