137520806 has 8 divisors (see below), whose sum is σ = 211312584. Its totient is φ = 67083280.

The previous prime is 137520797. The next prime is 137520809. The reversal of 137520806 is 608025731.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137520809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838460 + ... + 838623.

It is an arithmetic number, because the mean of its divisors is an integer number (26414073).

Almost surely, 2^137520806 is an apocalyptic number.

137520806 is a deficient number, since it is larger than the sum of its proper divisors (73791778).

137520806 is a wasteful number, since it uses less digits than its factorization.

137520806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677126.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 137520806 is about 11726.9265368211. The cubic root of 137520806 is about 516.1660898941.

The spelling of 137520806 in words is "one hundred thirty-seven million, five hundred twenty thousand, eight hundred six".