136220447 has 8 divisors (see below), whose sum is σ = 150822912. Its totient is φ = 121987800.

The previous prime is 136220437. The next prime is 136220489. The reversal of 136220447 is 744022631.

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

It is not a de Polignac number, because 136220447 - 2¹⁰ = 136219423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136220437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91679 + ... + 93152.

It is an arithmetic number, because the mean of its divisors is an integer number (18852864).

Almost surely, 2^136220447 is an apocalyptic number.

136220447 is a deficient number, since it is larger than the sum of its proper divisors (14602465).

136220447 is a wasteful number, since it uses less digits than its factorization.

136220447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184909.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 136220447 is about 11671.3515498420. The cubic root of 136220447 is about 514.5340266233.

The spelling of 136220447 in words is "one hundred thirty-six million, two hundred twenty thousand, four hundred forty-seven".