137693522 has 4 divisors (see below), whose sum is σ = 206540286. Its totient is φ = 68846760.

The previous prime is 137693477. The next prime is 137693581. The reversal of 137693522 is 225396731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225396731 = 7 ⋅32199533.

It can be written as a sum of positive squares in only one way, i.e., 126810121 + 10883401 = 11261^2 + 3299^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34423379 + ... + 34423382.

Almost surely, 2^137693522 is an apocalyptic number.

137693522 is a deficient number, since it is larger than the sum of its proper divisors (68846764).

137693522 is an equidigital number, since it uses as much as digits as its factorization.

137693522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68846763.

The product of its digits is 68040, while the sum is 38.

The square root of 137693522 is about 11734.2883039407. The cubic root of 137693522 is about 516.3820883528.

The spelling of 137693522 in words is "one hundred thirty-seven million, six hundred ninety-three thousand, five hundred twenty-two".