137291689 has 4 divisors (see below), whose sum is σ = 137348100. Its totient is φ = 137235280.

The previous prime is 137291659. The next prime is 137291717. The reversal of 137291689 is 986192731.

It is a happy number.

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 127306089 + 9985600 = 11283^2 + 3160^2 .

It is a cyclic number.

It is not a de Polignac number, because 137291689 - 2¹¹ = 137289641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137291639) 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, 24382 + ... + 29479.

It is an arithmetic number, because the mean of its divisors is an integer number (34337025).

Almost surely, 2^137291689 is an apocalyptic number.

It is an amenable number.

137291689 is a deficient number, since it is larger than the sum of its proper divisors (56411).

137291689 is an equidigital number, since it uses as much as digits as its factorization.

137291689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56410.

The product of its digits is 163296, while the sum is 46.

The square root of 137291689 is about 11717.1536219340. The cubic root of 137291689 is about 515.8792771383.

The spelling of 137291689 in words is "one hundred thirty-seven million, two hundred ninety-one thousand, six hundred eighty-nine".