135400079 has 4 divisors (see below), whose sum is σ = 135455160. Its totient is φ = 135345000.

The previous prime is 135400073. The next prime is 135400129. The reversal of 135400079 is 970004531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135400079 - 2⁴ = 135400063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135400073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23672 + ... + 28829.

It is an arithmetic number, because the mean of its divisors is an integer number (33863790).

Almost surely, 2^135400079 is an apocalyptic number.

135400079 is a deficient number, since it is larger than the sum of its proper divisors (55081).

135400079 is an equidigital number, since it uses as much as digits as its factorization.

135400079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55080.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 135400079 is about 11636.1539608240. The cubic root of 135400079 is about 513.4990438284.

The spelling of 135400079 in words is "one hundred thirty-five million, four hundred thousand, seventy-nine".