136786081 has 4 divisors (see below), whose sum is σ = 137199664. Its totient is φ = 136372500.

The previous prime is 136786079. The next prime is 136786087. The reversal of 136786081 is 180687631.

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.

It is a cyclic number.

It is not a de Polignac number, because 136786081 - 2¹ = 136786079 is a prime.

It is a super-2 number, since 2×136786081² = 37420863910677122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136786087) 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, 206295 + ... + 206956.

It is an arithmetic number, because the mean of its divisors is an integer number (34299916).

Almost surely, 2^136786081 is an apocalyptic number.

It is an amenable number.

136786081 is a deficient number, since it is larger than the sum of its proper divisors (413583).

136786081 is an equidigital number, since it uses as much as digits as its factorization.

136786081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413582.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 136786081 is about 11695.5581739394. The cubic root of 136786081 is about 515.2452170575.

The spelling of 136786081 in words is "one hundred thirty-six million, seven hundred eighty-six thousand, eighty-one".