136647993 has 8 divisors (see below), whose sum is σ = 187121728. Its totient is φ = 88636464.

The previous prime is 136647983. The next prime is 136647997. The reversal of 136647993 is 399746631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 136647993 - 2⁵ = 136647961 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136647997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615421 + ... + 615642.

It is an arithmetic number, because the mean of its divisors is an integer number (23390216).

Almost surely, 2^136647993 is an apocalyptic number.

It is an amenable number.

136647993 is a deficient number, since it is larger than the sum of its proper divisors (50473735).

136647993 is a wasteful number, since it uses less digits than its factorization.

136647993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231103.

The product of its digits is 734832, while the sum is 48.

The square root of 136647993 is about 11689.6532454988. The cubic root of 136647993 is about 515.0717755870.

The spelling of 136647993 in words is "one hundred thirty-six million, six hundred forty-seven thousand, nine hundred ninety-three".