137969 has 4 divisors (see below), whose sum is σ = 148596. Its totient is φ = 127344.

The previous prime is 137957. The next prime is 137983. The reversal of 137969 is 969731.

137969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93025 + 44944 = 305^2 + 212^2 .

It is a cyclic number.

It is not a de Polignac number, because 137969 - 2⁸ = 137713 is a prime.

It is a super-2 number, since 2×137969² = 38070889922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137909) 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, 5294 + ... + 5319.

It is an arithmetic number, because the mean of its divisors is an integer number (37149).

2¹³⁷⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

137969 is a deficient number, since it is larger than the sum of its proper divisors (10627).

137969 is a wasteful number, since it uses less digits than its factorization.

137969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10626.

The product of its digits is 10206, while the sum is 35.

The square root of 137969 is about 371.4417854792. The cubic root of 137969 is about 51.6726227380.

The spelling of 137969 in words is "one hundred thirty-seven thousand, nine hundred sixty-nine".