136319817 has 4 divisors (see below), whose sum is σ = 181759760. Its totient is φ = 90879876.

The previous prime is 136319809. The next prime is 136319837. The reversal of 136319817 is 718913631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 718913631 = 3 ⋅239637877.

It is not a de Polignac number, because 136319817 - 2³ = 136319809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136319837) 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, 22719967 + ... + 22719972.

It is an arithmetic number, because the mean of its divisors is an integer number (45439940).

Almost surely, 2^136319817 is an apocalyptic number.

It is an amenable number.

136319817 is a deficient number, since it is larger than the sum of its proper divisors (45439943).

136319817 is an equidigital number, since it uses as much as digits as its factorization.

136319817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45439942.

The product of its digits is 27216, while the sum is 39.

The square root of 136319817 is about 11675.6077786126. The cubic root of 136319817 is about 514.6591101914.

The spelling of 136319817 in words is "one hundred thirty-six million, three hundred nineteen thousand, eight hundred seventeen".