137305697 has 4 divisors (see below), whose sum is σ = 137739156. Its totient is φ = 136872240.

The previous prime is 137305681. The next prime is 137305703. The reversal of 137305697 is 796503731.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19018321 + 118287376 = 4361^2 + 10876^2 .

It is a cyclic number.

It is not a de Polignac number, because 137305697 - 2⁴ = 137305681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137305097) 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, 216254 + ... + 216887.

It is an arithmetic number, because the mean of its divisors is an integer number (34434789).

Almost surely, 2^137305697 is an apocalyptic number.

It is an amenable number.

137305697 is a deficient number, since it is larger than the sum of its proper divisors (433459).

137305697 is an equidigital number, since it uses as much as digits as its factorization.

137305697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433458.

The product of its (nonzero) digits is 119070, while the sum is 41.

The square root of 137305697 is about 11717.7513627829. The cubic root of 137305697 is about 515.8968217574.

The spelling of 137305697 in words is "one hundred thirty-seven million, three hundred five thousand, six hundred ninety-seven".