136679 has 4 divisors (see below), whose sum is σ = 141120. Its totient is φ = 132240.

The previous prime is 136657. The next prime is 136691. The reversal of 136679 is 976631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976631 = 53 ⋅18427.

It is a cyclic number.

It is not a de Polignac number, because 136679 - 2¹⁶ = 71143 is a prime.

It is a super-2 number, since 2×136679² = 37362298082, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136649) 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, 2174 + ... + 2235.

It is an arithmetic number, because the mean of its divisors is an integer number (35280).

2¹³⁶⁶⁷⁹ is an apocalyptic number.

136679 is a deficient number, since it is larger than the sum of its proper divisors (4441).

136679 is an equidigital number, since it uses as much as digits as its factorization.

136679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440.

The product of its digits is 6804, while the sum is 32.

The square root of 136679 is about 369.7012307256. The cubic root of 136679 is about 51.5110731209.

The spelling of 136679 in words is "one hundred thirty-six thousand, six hundred seventy-nine".