137909147 has 4 divisors (see below), whose sum is σ = 138192816. Its totient is φ = 137625480.

The previous prime is 137909143. The next prime is 137909179. The reversal of 137909147 is 741909731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137909147 - 2² = 137909143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137909143) 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, 141104 + ... + 142077.

It is an arithmetic number, because the mean of its divisors is an integer number (34548204).

Almost surely, 2^137909147 is an apocalyptic number.

137909147 is a deficient number, since it is larger than the sum of its proper divisors (283669).

137909147 is an equidigital number, since it uses as much as digits as its factorization.

137909147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283668.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 137909147 is about 11743.4725273234. The cubic root of 137909147 is about 516.6514954038.

The spelling of 137909147 in words is "one hundred thirty-seven million, nine hundred nine thousand, one hundred forty-seven".