137909143 has 2 divisors, whose sum is σ = 137909144. Its totient is φ = 137909142.

The previous prime is 137909119. The next prime is 137909179. The reversal of 137909143 is 341909731.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137909143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137909183) 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 as a sum of consecutive naturals, namely, 68954571 + 68954572.

It is an arithmetic number, because the mean of its divisors is an integer number (68954572).

Almost surely, 2^137909143 is an apocalyptic number.

137909143 is a deficient number, since it is larger than the sum of its proper divisors (1).

137909143 is an equidigital number, since it uses as much as digits as its factorization.

137909143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 137909143 is about 11743.4723570160. The cubic root of 137909143 is about 516.6514904087.

Subtracting from 137909143 its product of nonzero digits (20412), we obtain a palindrome (137888731).

The spelling of 137909143 in words is "one hundred thirty-seven million, nine hundred nine thousand, one hundred forty-three".