136678019 has 2 divisors, whose sum is σ = 136678020. Its totient is φ = 136678018.

The previous prime is 136678007. The next prime is 136678049. The reversal of 136678019 is 910876631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136678019 - 2¹² = 136673923 is a prime.

It is a super-2 number, since 2×136678019² = 37361761755528722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136678049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68339009 + 68339010.

It is an arithmetic number, because the mean of its divisors is an integer number (68339010).

Almost surely, 2^136678019 is an apocalyptic number.

136678019 is a deficient number, since it is larger than the sum of its proper divisors (1).

136678019 is an equidigital number, since it uses as much as digits as its factorization.

136678019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 136678019 is about 11690.9374731028. The cubic root of 136678019 is about 515.1094988207.

The spelling of 136678019 in words is "one hundred thirty-six million, six hundred seventy-eight thousand, nineteen".