137730665 has 8 divisors (see below), whose sum is σ = 165638088. Its totient is φ = 109943680.

The previous prime is 137730643. The next prime is 137730689. The reversal of 137730665 is 566037731.

It can be written as a sum of positive squares in 4 ways, for example, as 12201049 + 125529616 = 3493^2 + 11204^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137730665 - 2⁸ = 137730409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27572 + ... + 32181.

It is an arithmetic number, because the mean of its divisors is an integer number (20704761).

Almost surely, 2^137730665 is an apocalyptic number.

It is an amenable number.

137730665 is a deficient number, since it is larger than the sum of its proper divisors (27907423).

137730665 is an equidigital number, since it uses as much as digits as its factorization.

137730665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60219.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 137730665 is about 11735.8708667061. The cubic root of 137730665 is about 516.4285157501.

The spelling of 137730665 in words is "one hundred thirty-seven million, seven hundred thirty thousand, six hundred sixty-five".