136447491 has 8 divisors (see below), whose sum is σ = 192631824. Its totient is φ = 85614080.

The previous prime is 136447481. The next prime is 136447501. The reversal of 136447491 is 194744631.

It is an interprime number because it is at equal distance from previous prime (136447481) and next prime (136447501).

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

It is a cyclic number.

It is not a de Polignac number, because 136447491 - 2⁵ = 136447459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136447481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1337670 + ... + 1337771.

It is an arithmetic number, because the mean of its divisors is an integer number (24078978).

Almost surely, 2^136447491 is an apocalyptic number.

136447491 is a deficient number, since it is larger than the sum of its proper divisors (56184333).

136447491 is a wasteful number, since it uses less digits than its factorization.

136447491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675461.

The product of its digits is 72576, while the sum is 39.

The square root of 136447491 is about 11681.0740516444. The cubic root of 136447491 is about 514.8197326786.

The spelling of 136447491 in words is "one hundred thirty-six million, four hundred forty-seven thousand, four hundred ninety-one".