137820538 has 8 divisors (see below), whose sum is σ = 207203040. Its totient is φ = 68752860.

The previous prime is 137820503. The next prime is 137820539. The reversal of 137820538 is 835028731.

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

It is a junction number, because it is equal to n+sod(n) for n = 137820497 and 137820506.

It is not an unprimeable number, because it can be changed into a prime (137820539) 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, 77608 + ... + 79363.

It is an arithmetic number, because the mean of its divisors is an integer number (25900380).

Almost surely, 2^137820538 is an apocalyptic number.

137820538 is a deficient number, since it is larger than the sum of its proper divisors (69382502).

137820538 is a wasteful number, since it uses less digits than its factorization.

137820538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157412.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 137820538 is about 11739.6992295374. The cubic root of 137820538 is about 516.5408192046.

The spelling of 137820538 in words is "one hundred thirty-seven million, eight hundred twenty thousand, five hundred thirty-eight".