137140247 has 2 divisors, whose sum is σ = 137140248. Its totient is φ = 137140246.

The previous prime is 137140231. The next prime is 137140279. The reversal of 137140247 is 742041731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137140247 - 2⁴ = 137140231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137140447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68570123 + 68570124.

It is an arithmetic number, because the mean of its divisors is an integer number (68570124).

Almost surely, 2^137140247 is an apocalyptic number.

137140247 is a deficient number, since it is larger than the sum of its proper divisors (1).

137140247 is an equidigital number, since it uses as much as digits as its factorization.

137140247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 137140247 is about 11710.6894331632. The cubic root of 137140247 is about 515.6895241297.

Adding to 137140247 its reverse (742041731), we get a palindrome (879181978).

The spelling of 137140247 in words is "one hundred thirty-seven million, one hundred forty thousand, two hundred forty-seven".