136687818 has 16 divisors (see below), whose sum is σ = 273490560. Its totient is φ = 45543456.

The previous prime is 136687799. The next prime is 136687829. The reversal of 136687818 is 818786631.

It is a super-2 number, since 2×136687818² = 37367119179202248, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 23871 + ... + 29037.

It is an arithmetic number, because the mean of its divisors is an integer number (17093160).

Almost surely, 2^136687818 is an apocalyptic number.

136687818 is an abundant number, since it is smaller than the sum of its proper divisors (136802742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136687818 is a wasteful number, since it uses less digits than its factorization.

136687818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9581.

The product of its digits is 387072, while the sum is 48.

The square root of 136687818 is about 11691.3565508884. The cubic root of 136687818 is about 515.1218086210.

The spelling of 136687818 in words is "one hundred thirty-six million, six hundred eighty-seven thousand, eight hundred eighteen".