136418897 has 4 divisors (see below), whose sum is σ = 144443556. Its totient is φ = 128394240.

The previous prime is 136418861. The next prime is 136418939. The reversal of 136418897 is 798814631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798814631 = 13967 ⋅57193.

It can be written as a sum of positive squares in 2 ways, for example, as 115111441 + 21307456 = 10729^2 + 4616^2 .

It is a cyclic number.

It is not a de Polignac number, because 136418897 - 2¹² = 136414801 is a prime.

It is a super-2 number, since 2×136418897² = 37220230917393218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136418837) 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, 4012304 + ... + 4012337.

It is an arithmetic number, because the mean of its divisors is an integer number (36110889).

Almost surely, 2^136418897 is an apocalyptic number.

136418897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

136418897 is a deficient number, since it is larger than the sum of its proper divisors (8024659).

136418897 is an equidigital number, since it uses as much as digits as its factorization.

136418897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8024658.

The product of its digits is 290304, while the sum is 47.

The square root of 136418897 is about 11679.8500418456. The cubic root of 136418897 is about 514.7837682116.

The spelling of 136418897 in words is "one hundred thirty-six million, four hundred eighteen thousand, eight hundred ninety-seven".