137145207 has 4 divisors (see below), whose sum is σ = 182860280. Its totient is φ = 91430136.

The previous prime is 137145191. The next prime is 137145227. The reversal of 137145207 is 702541731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702541731 = 3 ⋅234180577.

It is not a de Polignac number, because 137145207 - 2⁴ = 137145191 is a prime.

It is a super-3 number, since 3×137145207³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137145227) 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, 22857532 + ... + 22857537.

It is an arithmetic number, because the mean of its divisors is an integer number (45715070).

Almost surely, 2^137145207 is an apocalyptic number.

137145207 is a deficient number, since it is larger than the sum of its proper divisors (45715073).

137145207 is an equidigital number, since it uses as much as digits as its factorization.

137145207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45715072.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 137145207 is about 11710.9012035795. The cubic root of 137145207 is about 515.6957410968.

Adding to 137145207 its reverse (702541731), we get a palindrome (839686938).

The spelling of 137145207 in words is "one hundred thirty-seven million, one hundred forty-five thousand, two hundred seven".