136961 has 4 divisors (see below), whose sum is σ = 149424. Its totient is φ = 124500.

The previous prime is 136951. The next prime is 136963. The reversal of 136961 is 169631.

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.

It is a cyclic number.

It is not a de Polignac number, because 136961 - 2⁶ = 136897 is a prime.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 136961.

It is not an unprimeable number, because it can be changed into a prime (136963) 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, 6215 + ... + 6236.

It is an arithmetic number, because the mean of its divisors is an integer number (37356).

2¹³⁶⁹⁶¹ is an apocalyptic number.

136961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

136961 is a deficient number, since it is larger than the sum of its proper divisors (12463).

136961 is a wasteful number, since it uses less digits than its factorization.

136961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12462.

The product of its digits is 972, while the sum is 26.

The square root of 136961 is about 370.0824232519. The cubic root of 136961 is about 51.5464751549.

The spelling of 136961 in words is "one hundred thirty-six thousand, nine hundred sixty-one".