137731786789 has 2 divisors, whose sum is σ = 137731786790. Its totient is φ = 137731786788.

The previous prime is 137731786729. The next prime is 137731786799. The reversal of 137731786789 is 987687137731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82795458564 + 54936328225 = 287742^2 + 234385^2 .

It is a cyclic number.

It is not a de Polignac number, because 137731786789 - 2³⁵ = 103372048421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137731786729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68865893394 + 68865893395.

It is an arithmetic number, because the mean of its divisors is an integer number (68865893395).

Almost surely, 2^137731786789 is an apocalyptic number.

It is an amenable number.

137731786789 is a deficient number, since it is larger than the sum of its proper divisors (1).

137731786789 is an equidigital number, since it uses as much as digits as its factorization.

137731786789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74680704, while the sum is 67.

The spelling of 137731786789 in words is "one hundred thirty-seven billion, seven hundred thirty-one million, seven hundred eighty-six thousand, seven hundred eighty-nine".