135668379 has 32 divisors (see below), whose sum is σ = 237404160. Its totient is φ = 66765600.

The previous prime is 135668363. The next prime is 135668387. The reversal of 135668379 is 973866531.

It is a happy number.

It is not a de Polignac number, because 135668379 - 2⁴ = 135668363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135668389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11067 + ... + 19844.

It is an arithmetic number, because the mean of its divisors is an integer number (7418880).

Almost surely, 2^135668379 is an apocalyptic number.

135668379 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

135668379 is a deficient number, since it is larger than the sum of its proper divisors (101735781).

135668379 is a wasteful number, since it uses less digits than its factorization.

135668379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30951.

The product of its digits is 816480, while the sum is 48.

The square root of 135668379 is about 11647.6769786941. The cubic root of 135668379 is about 513.8379921625.

It can be divided in two parts, 13566 and 8379, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 135668379 in words is "one hundred thirty-five million, six hundred sixty-eight thousand, three hundred seventy-nine".