136138619 has 4 divisors (see below), whose sum is σ = 136278096. Its totient is φ = 135999144.

The previous prime is 136138589. The next prime is 136138621. The reversal of 136138619 is 916831631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 916831631 = 89 ⋅10301479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136138619 is a prime.

It is a super-2 number, since 2×136138619² = 37067447166454322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136138319) 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, 68264 + ... + 70229.

It is an arithmetic number, because the mean of its divisors is an integer number (34069524).

Almost surely, 2^136138619 is an apocalyptic number.

136138619 is a deficient number, since it is larger than the sum of its proper divisors (139477).

136138619 is an equidigital number, since it uses as much as digits as its factorization.

136138619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139476.

The product of its digits is 23328, while the sum is 38.

The square root of 136138619 is about 11667.8455166325. The cubic root of 136138619 is about 514.4309786483.

The spelling of 136138619 in words is "one hundred thirty-six million, one hundred thirty-eight thousand, six hundred nineteen".