137763521 has 8 divisors (see below), whose sum is σ = 158236800. Its totient is φ = 117488448.

The previous prime is 137763517. The next prime is 137763523. The reversal of 137763521 is 125367731.

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

It is not a de Polignac number, because 137763521 - 2² = 137763517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137763523) 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 7 ways as a sum of consecutive naturals, for example, 48056 + ... + 50841.

It is an arithmetic number, because the mean of its divisors is an integer number (19779600).

Almost surely, 2^137763521 is an apocalyptic number.

It is an amenable number.

137763521 is a deficient number, since it is larger than the sum of its proper divisors (20473279).

137763521 is an equidigital number, since it uses as much as digits as its factorization.

137763521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99103.

The product of its digits is 26460, while the sum is 35.

The square root of 137763521 is about 11737.2705941373. The cubic root of 137763521 is about 516.4695775965.

The spelling of 137763521 in words is "one hundred thirty-seven million, seven hundred sixty-three thousand, five hundred twenty-one".