137857297 has 4 divisors (see below), whose sum is σ = 137933236. Its totient is φ = 137781360.

The previous prime is 137857289. The next prime is 137857303. The reversal of 137857297 is 792758731.

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 9511056 + 128346241 = 3084^2 + 11329^2 .

It is a cyclic number.

It is not a de Polignac number, because 137857297 - 2³ = 137857289 is a prime.

It is a super-2 number, since 2×137857297² = 38009268672292418, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 137857297.

It is not an unprimeable number, because it can be changed into a prime (137857207) 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, 35178 + ... + 38899.

It is an arithmetic number, because the mean of its divisors is an integer number (34483309).

Almost surely, 2^137857297 is an apocalyptic number.

It is an amenable number.

137857297 is a deficient number, since it is larger than the sum of its proper divisors (75939).

137857297 is an equidigital number, since it uses as much as digits as its factorization.

137857297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75938.

The product of its digits is 740880, while the sum is 49.

The square root of 137857297 is about 11741.2647104134. The cubic root of 137857297 is about 516.5867384278.

The spelling of 137857297 in words is "one hundred thirty-seven million, eight hundred fifty-seven thousand, two hundred ninety-seven".