137869 has 2 divisors, whose sum is σ = 137870. Its totient is φ = 137868.

The previous prime is 137867. The next prime is 137873. The reversal of 137869 is 968731.

137869 is nontrivially palindromic in base 13.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81225 + 56644 = 285^2 + 238^2 .

It is an emirp because it is prime and its reverse (968731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137869 - 2¹ = 137867 is a prime.

It is a super-2 number, since 2×137869² = 38015722322, which contains 22 as substring.

Together with 137867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68934 + 68935.

It is an arithmetic number, because the mean of its divisors is an integer number (68935).

2¹³⁷⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

137869 is a deficient number, since it is larger than the sum of its proper divisors (1).

137869 is an equidigital number, since it uses as much as digits as its factorization.

137869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 137869 is about 371.3071504833. The cubic root of 137869 is about 51.6601356064.

The spelling of 137869 in words is "one hundred thirty-seven thousand, eight hundred sixty-nine".