136678357 has 4 divisors (see below), whose sum is σ = 136731136. Its totient is φ = 136625580.

The previous prime is 136678309. The next prime is 136678427. The reversal of 136678357 is 753876631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136678357 - 2²⁷ = 2460629 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 (136678757) 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 3 ways as a sum of consecutive naturals, for example, 22293 + ... + 27754.

It is an arithmetic number, because the mean of its divisors is an integer number (34182784).

Almost surely, 2^136678357 is an apocalyptic number.

It is an amenable number.

136678357 is a deficient number, since it is larger than the sum of its proper divisors (52779).

136678357 is an equidigital number, since it uses as much as digits as its factorization.

136678357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52778.

The product of its digits is 635040, while the sum is 46.

The square root of 136678357 is about 11690.9519287353. The cubic root of 136678357 is about 515.1099234363.

Subtracting from 136678357 its sum of digits (46), we obtain a triangular number (136678311 = T₁₆₅₃₃).

The spelling of 136678357 in words is "one hundred thirty-six million, six hundred seventy-eight thousand, three hundred fifty-seven".