136369481 has 4 divisors (see below), whose sum is σ = 136392852. Its totient is φ = 136346112.

The previous prime is 136369463. The next prime is 136369483. The reversal of 136369481 is 184963631.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 184963631 = 23 ⋅8041897.

It can be written as a sum of positive squares in 2 ways, for example, as 15721225 + 120648256 = 3965^2 + 10984^2 .

It is a cyclic number.

It is not a de Polignac number, because 136369481 - 2¹⁸ = 136107337 is a prime.

It is a super-2 number, since 2×136369481² = 37193270696418722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136369483) 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, 5225 + ... + 17321.

It is an arithmetic number, because the mean of its divisors is an integer number (34098213).

Almost surely, 2^136369481 is an apocalyptic number.

It is an amenable number.

136369481 is a deficient number, since it is larger than the sum of its proper divisors (23371).

136369481 is a wasteful number, since it uses less digits than its factorization.

136369481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23370.

The product of its digits is 93312, while the sum is 41.

The square root of 136369481 is about 11677.7344121195. The cubic root of 136369481 is about 514.7216027603.

The spelling of 136369481 in words is "one hundred thirty-six million, three hundred sixty-nine thousand, four hundred eighty-one".