136243619 has 2 divisors, whose sum is σ = 136243620. Its totient is φ = 136243618.

The previous prime is 136243589. The next prime is 136243621. The reversal of 136243619 is 916342631.

It is a happy number.

136243619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136243619 is a prime.

It is a super-2 number, since 2×136243619² = 37124647436434322, which contains 22 as substring.

Together with 136243621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136243649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68121809 + 68121810.

It is an arithmetic number, because the mean of its divisors is an integer number (68121810).

Almost surely, 2^136243619 is an apocalyptic number.

136243619 is a deficient number, since it is larger than the sum of its proper divisors (1).

136243619 is an equidigital number, since it uses as much as digits as its factorization.

136243619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The square root of 136243619 is about 11672.3441947194. The cubic root of 136243619 is about 514.5632001841.

The spelling of 136243619 in words is "one hundred thirty-six million, two hundred forty-three thousand, six hundred nineteen".