107688989 has 2 divisors, whose sum is σ = 107688990. Its totient is φ = 107688988.

The previous prime is 107688937. The next prime is 107689003. The reversal of 107688989 is 989886701.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83265625 + 24423364 = 9125^2 + 4942^2 .

It is an emirp because it is prime and its reverse (989886701) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-107688989 is a prime.

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 (107688089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53844494 + 53844495.

It is an arithmetic number, because the mean of its divisors is an integer number (53844495).

Almost surely, 2^107688989 is an apocalyptic number.

It is an amenable number.

107688989 is a deficient number, since it is larger than the sum of its proper divisors (1).

107688989 is an equidigital number, since it uses as much as digits as its factorization.

107688989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The square root of 107688989 is about 10377.3305334272. The cubic root of 107688989 is about 475.7627472060.

The spelling of 107688989 in words is "one hundred seven million, six hundred eighty-eight thousand, nine hundred eighty-nine".