136637 has 4 divisors (see below), whose sum is σ = 137760. Its totient is φ = 135516.

The previous prime is 136621. The next prime is 136649. The reversal of 136637 is 736631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 136637 - 2⁴ = 136621 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 (136607) 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, 353 + ... + 630.

It is an arithmetic number, because the mean of its divisors is an integer number (34440).

2¹³⁶⁶³⁷ is an apocalyptic number.

It is an amenable number.

136637 is a deficient number, since it is larger than the sum of its proper divisors (1123).

136637 is an equidigital number, since it uses as much as digits as its factorization.

136637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122.

The product of its digits is 2268, while the sum is 26.

The square root of 136637 is about 369.6444237372. The cubic root of 136637 is about 51.5057963124.

The spelling of 136637 in words is "one hundred thirty-six thousand, six hundred thirty-seven".