136144673 has 4 divisors (see below), whose sum is σ = 155593920. Its totient is φ = 116695428.

The previous prime is 136144661. The next prime is 136144691. The reversal of 136144673 is 376441631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 376441631 = 263 ⋅1431337.

It is a cyclic number.

It is not a de Polignac number, because 136144673 - 2¹² = 136140577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136144643) 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, 9724613 + ... + 9724626.

It is an arithmetic number, because the mean of its divisors is an integer number (38898480).

Almost surely, 2^136144673 is an apocalyptic number.

It is an amenable number.

136144673 is a deficient number, since it is larger than the sum of its proper divisors (19449247).

136144673 is an equidigital number, since it uses as much as digits as its factorization.

136144673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19449246.

The product of its digits is 36288, while the sum is 35.

The square root of 136144673 is about 11668.1049446772. The cubic root of 136144673 is about 514.4386040108.

The spelling of 136144673 in words is "one hundred thirty-six million, one hundred forty-four thousand, six hundred seventy-three".