137522537 has 4 divisors (see below), whose sum is σ = 145612116. Its totient is φ = 129432960.

The previous prime is 137522519. The next prime is 137522563. The reversal of 137522537 is 735225731.

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 128618281 + 8904256 = 11341^2 + 2984^2 .

It is a cyclic number.

It is not a de Polignac number, because 137522537 - 2¹² = 137518441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137522497 and 137522506.

It is not an unprimeable number, because it can be changed into a prime (137522587) 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, 4044764 + ... + 4044797.

It is an arithmetic number, because the mean of its divisors is an integer number (36403029).

Almost surely, 2^137522537 is an apocalyptic number.

137522537 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

137522537 is a deficient number, since it is larger than the sum of its proper divisors (8089579).

137522537 is an equidigital number, since it uses as much as digits as its factorization.

137522537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8089578.

The product of its digits is 44100, while the sum is 35.

The square root of 137522537 is about 11727.0003410932. Note that the first 3 decimals coincide. The cubic root of 137522537 is about 516.1682555779.

The spelling of 137522537 in words is "one hundred thirty-seven million, five hundred twenty-two thousand, five hundred thirty-seven".