137766689 has 2 divisors, whose sum is σ = 137766690. Its totient is φ = 137766688.

The previous prime is 137766677. The next prime is 137766721. The reversal of 137766689 is 986667731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133633600 + 4133089 = 11560^2 + 2033^2 .

It is a cyclic number.

It is not a de Polignac number, because 137766689 - 2¹⁶ = 137701153 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137766689.

It is not a weakly prime, because it can be changed into another prime (137766289) 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, 68883344 + 68883345.

It is an arithmetic number, because the mean of its divisors is an integer number (68883345).

Almost surely, 2^137766689 is an apocalyptic number.

It is an amenable number.

137766689 is a deficient number, since it is larger than the sum of its proper divisors (1).

137766689 is an equidigital number, since it uses as much as digits as its factorization.

137766689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 53.

The square root of 137766689 is about 11737.4055480758. The cubic root of 137766689 is about 516.4735364652.

The spelling of 137766689 in words is "one hundred thirty-seven million, seven hundred sixty-six thousand, six hundred eighty-nine".