137705207 has 4 divisors (see below), whose sum is σ = 137753256. Its totient is φ = 137657160.

The previous prime is 137705203. The next prime is 137705251. The reversal of 137705207 is 702507731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702507731 = 47 ⋅14946973.

It is a cyclic number.

It is not a de Polignac number, because 137705207 - 2² = 137705203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137705201) 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, 19433 + ... + 25554.

It is an arithmetic number, because the mean of its divisors is an integer number (34438314).

Almost surely, 2^137705207 is an apocalyptic number.

137705207 is a deficient number, since it is larger than the sum of its proper divisors (48049).

137705207 is an equidigital number, since it uses as much as digits as its factorization.

137705207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48048.

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 137705207 is about 11734.7861931950. The cubic root of 137705207 is about 516.3966950773.

The spelling of 137705207 in words is "one hundred thirty-seven million, seven hundred five thousand, two hundred seven".