137640806 has 16 divisors (see below), whose sum is σ = 225659520. Its totient is φ = 62682240.

The previous prime is 137640803. The next prime is 137640821. The reversal of 137640806 is 608046731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137640803) 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 7 ways as a sum of consecutive naturals, for example, 64241 + ... + 66348.

It is an arithmetic number, because the mean of its divisors is an integer number (14103720).

Almost surely, 2^137640806 is an apocalyptic number.

137640806 is a deficient number, since it is larger than the sum of its proper divisors (88018714).

137640806 is a wasteful number, since it uses less digits than its factorization.

137640806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130639.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 137640806 is about 11732.0418512721. The cubic root of 137640806 is about 516.3161809364.

The spelling of 137640806 in words is "one hundred thirty-seven million, six hundred forty thousand, eight hundred six".