136663639 has 8 divisors (see below), whose sum is σ = 159510528. Its totient is φ = 114647640.

The previous prime is 136663621. The next prime is 136663643. The reversal of 136663639 is 936366631.

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 136663639 - 2⁷ = 136663511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136663595 and 136663604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136663609) 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, 207367 + ... + 208024.

It is an arithmetic number, because the mean of its divisors is an integer number (19938816).

Almost surely, 2^136663639 is an apocalyptic number.

136663639 is a deficient number, since it is larger than the sum of its proper divisors (22846889).

136663639 is an equidigital number, since it uses as much as digits as its factorization.

136663639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415445.

The product of its digits is 314928, while the sum is 43.

The square root of 136663639 is about 11690.3224506427. The cubic root of 136663639 is about 515.0914331643.

The spelling of 136663639 in words is "one hundred thirty-six million, six hundred sixty-three thousand, six hundred thirty-nine".