137689121 has 4 divisors (see below), whose sum is σ = 137760000. Its totient is φ = 137618244.

The previous prime is 137689117. The next prime is 137689133. The reversal of 137689121 is 121986731.

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 an emirpimes, since its reverse is a distinct semiprime: 121986731 = 29 ⋅4206439.

It is a cyclic number.

It is not a de Polignac number, because 137689121 - 2² = 137689117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137689921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32441 + ... + 36438.

It is an arithmetic number, because the mean of its divisors is an integer number (34440000).

Almost surely, 2^137689121 is an apocalyptic number.

It is an amenable number.

137689121 is a deficient number, since it is larger than the sum of its proper divisors (70879).

137689121 is an equidigital number, since it uses as much as digits as its factorization.

137689121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70878.

The product of its digits is 18144, while the sum is 38.

The square root of 137689121 is about 11734.1007750914. The cubic root of 137689121 is about 516.3765867098.

The spelling of 137689121 in words is "one hundred thirty-seven million, six hundred eighty-nine thousand, one hundred twenty-one".