135423923 has 2 divisors, whose sum is σ = 135423924. Its totient is φ = 135423922.

The previous prime is 135423919. The next prime is 135423971. The reversal of 135423923 is 329324531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135423923 - 2² = 135423919 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135423923.

It is not a weakly prime, because it can be changed into another prime (135423973) 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, 67711961 + 67711962.

It is an arithmetic number, because the mean of its divisors is an integer number (67711962).

Almost surely, 2^135423923 is an apocalyptic number.

135423923 is a deficient number, since it is larger than the sum of its proper divisors (1).

135423923 is an equidigital number, since it uses as much as digits as its factorization.

135423923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 135423923 is about 11637.1784810580. The cubic root of 135423923 is about 513.5291845114.

The spelling of 135423923 in words is "one hundred thirty-five million, four hundred twenty-three thousand, nine hundred twenty-three".