106388489 has 2 divisors, whose sum is σ = 106388490. Its totient is φ = 106388488.

The previous prime is 106388449. The next prime is 106388509. The reversal of 106388489 is 984883601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 39476089 = 8180^2 + 6283^2 .

It is a cyclic number.

It is not a de Polignac number, because 106388489 - 2²⁴ = 89611273 is a prime.

It is a super-2 number, since 2×106388489² = 22637021183406242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (106388449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53194244 + 53194245.

It is an arithmetic number, because the mean of its divisors is an integer number (53194245).

Almost surely, 2^106388489 is an apocalyptic number.

It is an amenable number.

106388489 is a deficient number, since it is larger than the sum of its proper divisors (1).

106388489 is an equidigital number, since it uses as much as digits as its factorization.

106388489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 106388489 is about 10314.4795796977. The cubic root of 106388489 is about 473.8398115733.

The spelling of 106388489 in words is "one hundred six million, three hundred eighty-eight thousand, four hundred eighty-nine".