137728039 has 2 divisors, whose sum is σ = 137728040. Its totient is φ = 137728038.

The previous prime is 137728027. The next prime is 137728043. The reversal of 137728039 is 930827731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137728039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137727992 and 137728010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137728049) 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, 68864019 + 68864020.

It is an arithmetic number, because the mean of its divisors is an integer number (68864020).

Almost surely, 2^137728039 is an apocalyptic number.

137728039 is a deficient number, since it is larger than the sum of its proper divisors (1).

137728039 is an equidigital number, since it uses as much as digits as its factorization.

137728039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 137728039 is about 11735.7589869595. The cubic root of 137728039 is about 516.4252336199.

The spelling of 137728039 in words is "one hundred thirty-seven million, seven hundred twenty-eight thousand, thirty-nine".