137706869 has 2 divisors, whose sum is σ = 137706870. Its totient is φ = 137706868.

The previous prime is 137706857. The next prime is 137706893. The reversal of 137706869 is 968607731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104816644 + 32890225 = 10238^2 + 5735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137706869 is a prime.

It is a super-2 number, since 2×137706869² = 37926363539566322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137706839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68853434 + 68853435.

It is an arithmetic number, because the mean of its divisors is an integer number (68853435).

Almost surely, 2^137706869 is an apocalyptic number.

It is an amenable number.

137706869 is a deficient number, since it is larger than the sum of its proper divisors (1).

137706869 is an equidigital number, since it uses as much as digits as its factorization.

137706869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 137706869 is about 11734.8570080764. The cubic root of 137706869 is about 516.3987725776.

The spelling of 137706869 in words is "one hundred thirty-seven million, seven hundred six thousand, eight hundred sixty-nine".