137750729 has 8 divisors (see below), whose sum is σ = 140541480. Its totient is φ = 134987776.

The previous prime is 137750719. The next prime is 137750761. The reversal of 137750729 is 927057731.

It can be written as a sum of positive squares in 4 ways, for example, as 22231225 + 115519504 = 4715^2 + 10748^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 137750729 - 2⁴ = 137750713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137750719) by changing a digit.

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, 3209 + ... + 16905.

It is an arithmetic number, because the mean of its divisors is an integer number (17567685).

Almost surely, 2^137750729 is an apocalyptic number.

It is an amenable number.

137750729 is a deficient number, since it is larger than the sum of its proper divisors (2790751).

137750729 is a wasteful number, since it uses less digits than its factorization.

137750729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13899.

The product of its (nonzero) digits is 92610, while the sum is 41.

The square root of 137750729 is about 11736.7256507085. The cubic root of 137750729 is about 516.4535915472.

The spelling of 137750729 in words is "one hundred thirty-seven million, seven hundred fifty thousand, seven hundred twenty-nine".