137520347 has 8 divisors (see below), whose sum is σ = 146165760. Its totient is φ = 129015720.

The previous prime is 137520337. The next prime is 137520353. The reversal of 137520347 is 743025731.

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

It is a cyclic number.

It is not a de Polignac number, because 137520347 - 2¹² = 137516251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137520307) 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, 33179 + ... + 37092.

It is an arithmetic number, because the mean of its divisors is an integer number (18270720).

Almost surely, 2^137520347 is an apocalyptic number.

137520347 is a deficient number, since it is larger than the sum of its proper divisors (8645413).

137520347 is a wasteful number, since it uses less digits than its factorization.

137520347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70393.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 137520347 is about 11726.9069664597. The cubic root of 137520347 is about 516.1655156283.

The spelling of 137520347 in words is "one hundred thirty-seven million, five hundred twenty thousand, three hundred forty-seven".