135671623 has 2 divisors, whose sum is σ = 135671624. Its totient is φ = 135671622.

The previous prime is 135671603. The next prime is 135671629. The reversal of 135671623 is 326176531.

It is a strong prime.

It is an emirp because it is prime and its reverse (326176531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135671623 - 2⁹ = 135671111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135671629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67835811 + 67835812.

It is an arithmetic number, because the mean of its divisors is an integer number (67835812).

Almost surely, 2^135671623 is an apocalyptic number.

135671623 is a deficient number, since it is larger than the sum of its proper divisors (1).

135671623 is an equidigital number, since it uses as much as digits as its factorization.

135671623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 135671623 is about 11647.8162330971. The cubic root of 135671623 is about 513.8420876321.

The spelling of 135671623 in words is "one hundred thirty-five million, six hundred seventy-one thousand, six hundred twenty-three".