136168643 has 4 divisors (see below), whose sum is σ = 146643168. Its totient is φ = 125694120.

The previous prime is 136168633. The next prime is 136168651. The reversal of 136168643 is 346861631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346861631 = 337 ⋅1029263.

It is a cyclic number.

It is not a de Polignac number, because 136168643 - 2⁸ = 136168387 is a prime.

It is a super-2 number, since 2×136168643² = 37083798672922898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136168597 and 136168606.

It is not an unprimeable number, because it can be changed into a prime (136168603) 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, 5237243 + ... + 5237268.

It is an arithmetic number, because the mean of its divisors is an integer number (36660792).

Almost surely, 2^136168643 is an apocalyptic number.

136168643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

136168643 is a deficient number, since it is larger than the sum of its proper divisors (10474525).

136168643 is a wasteful number, since it uses less digits than its factorization.

136168643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10474524.

The product of its digits is 62208, while the sum is 38.

The square root of 136168643 is about 11669.1320585552. The cubic root of 136168643 is about 514.4687933906.

The spelling of 136168643 in words is "one hundred thirty-six million, one hundred sixty-eight thousand, six hundred forty-three".