136418947 has 4 divisors (see below), whose sum is σ = 155907376. Its totient is φ = 116930520.

The previous prime is 136418939. The next prime is 136418951. The reversal of 136418947 is 749814631.

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

It is not a de Polignac number, because 136418947 - 2³ = 136418939 is a prime.

It is a super-2 number, since 2×136418947² = 37220258201177618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136418647) 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, 9744204 + ... + 9744217.

It is an arithmetic number, because the mean of its divisors is an integer number (38976844).

Almost surely, 2^136418947 is an apocalyptic number.

136418947 is a deficient number, since it is larger than the sum of its proper divisors (19488429).

136418947 is an equidigital number, since it uses as much as digits as its factorization.

136418947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19488428.

The product of its digits is 145152, while the sum is 43.

The square root of 136418947 is about 11679.8521822838. The cubic root of 136418947 is about 514.7838311042.

The spelling of 136418947 in words is "one hundred thirty-six million, four hundred eighteen thousand, nine hundred forty-seven".