137820539 has 2 divisors, whose sum is σ = 137820540. Its totient is φ = 137820538.

The previous prime is 137820503. The next prime is 137820559. The reversal of 137820539 is 935028731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137820539 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137820559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68910269 + 68910270.

It is an arithmetic number, because the mean of its divisors is an integer number (68910270).

Almost surely, 2^137820539 is an apocalyptic number.

137820539 is a deficient number, since it is larger than the sum of its proper divisors (1).

137820539 is an equidigital number, since it uses as much as digits as its factorization.

137820539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 137820539 is about 11739.6992721279. The cubic root of 137820539 is about 516.5408204539.

The spelling of 137820539 in words is "one hundred thirty-seven million, eight hundred twenty thousand, five hundred thirty-nine".