136609771 has 4 divisors (see below), whose sum is σ = 137181600. Its totient is φ = 136037944.

The previous prime is 136609769. The next prime is 136609787. The reversal of 136609771 is 177906631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136609771 - 2¹ = 136609769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136609741) 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, 285556 + ... + 286033.

It is an arithmetic number, because the mean of its divisors is an integer number (34295400).

Almost surely, 2^136609771 is an apocalyptic number.

136609771 is a deficient number, since it is larger than the sum of its proper divisors (571829).

136609771 is an equidigital number, since it uses as much as digits as its factorization.

136609771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571828.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 136609771 is about 11688.0182665839. The cubic root of 136609771 is about 515.0237472947.

The spelling of 136609771 in words is "one hundred thirty-six million, six hundred nine thousand, seven hundred seventy-one".