137681535 has 8 divisors (see below), whose sum is σ = 220290480. Its totient is φ = 73430144.

The previous prime is 137681507. The next prime is 137681539. The reversal of 137681535 is 535186731.

It is a happy number.

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 137681535 - 2⁵ = 137681503 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137681493 and 137681502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137681539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4589370 + ... + 4589399.

It is an arithmetic number, because the mean of its divisors is an integer number (27536310).

Almost surely, 2^137681535 is an apocalyptic number.

137681535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

137681535 is a deficient number, since it is larger than the sum of its proper divisors (82608945).

137681535 is an equidigital number, since it uses as much as digits as its factorization.

137681535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9178777.

The product of its digits is 75600, while the sum is 39.

The square root of 137681535 is about 11733.7775247360. Note that the first 3 decimals coincide. The cubic root of 137681535 is about 516.3671032573.

The spelling of 137681535 in words is "one hundred thirty-seven million, six hundred eighty-one thousand, five hundred thirty-five".