136778079 has 8 divisors (see below), whose sum is σ = 190300032. Its totient is φ = 87220760.

The previous prime is 136778069. The next prime is 136778087. The reversal of 136778079 is 970877631.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136778079 - 2⁴ = 136778063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136778029) 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 in 7 ways as a sum of consecutive naturals, for example, 991077 + ... + 991214.

It is an arithmetic number, because the mean of its divisors is an integer number (23787504).

Almost surely, 2^136778079 is an apocalyptic number.

136778079 is a deficient number, since it is larger than the sum of its proper divisors (53521953).

136778079 is a wasteful number, since it uses less digits than its factorization.

136778079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982317.

The product of its (nonzero) digits is 444528, while the sum is 48.

The square root of 136778079 is about 11695.2160732498. The cubic root of 136778079 is about 515.2351695619.

The spelling of 136778079 in words is "one hundred thirty-six million, seven hundred seventy-eight thousand, seventy-nine".