137665753 has 4 divisors (see below), whose sum is σ = 138884148. Its totient is φ = 136447360.

The previous prime is 137665729. The next prime is 137665763. The reversal of 137665753 is 357566731.

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 66634569 + 71031184 = 8163^2 + 8428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137665753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137665763) 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 3 ways as a sum of consecutive naturals, for example, 609028 + ... + 609253.

It is an arithmetic number, because the mean of its divisors is an integer number (34721037).

Almost surely, 2^137665753 is an apocalyptic number.

It is an amenable number.

137665753 is a deficient number, since it is larger than the sum of its proper divisors (1218395).

137665753 is a wasteful number, since it uses less digits than its factorization.

137665753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218394.

The product of its digits is 396900, while the sum is 43.

The square root of 137665753 is about 11733.1050025132. The cubic root of 137665753 is about 516.3473726594.

The spelling of 137665753 in words is "one hundred thirty-seven million, six hundred sixty-five thousand, seven hundred fifty-three".