10409989 has 2 divisors, whose sum is σ = 10409990. Its totient is φ = 10409988.

The previous prime is 10409981. The next prime is 10410011. The reversal of 10409989 is 98990401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9796900 + 613089 = 3130^2 + 783^2 .

It is a cyclic number.

It is not a de Polignac number, because 10409989 - 2³ = 10409981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10409981) 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, 5204994 + 5204995.

It is an arithmetic number, because the mean of its divisors is an integer number (5204995).

Almost surely, 2^10409989 is an apocalyptic number.

It is an amenable number.

10409989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10409989 is an equidigital number, since it uses as much as digits as its factorization.

10409989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 10409989 is about 3226.4514563216. The cubic root of 10409989 is about 218.3484383751.

The spelling of 10409989 in words is "ten million, four hundred nine thousand, nine hundred eighty-nine".