10812409 has 2 divisors, whose sum is σ = 10812410. Its totient is φ = 10812408.

The previous prime is 10812407. The next prime is 10812413. The reversal of 10812409 is 90421801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10582009 + 230400 = 3253^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 10812409 - 2¹ = 10812407 is a prime.

Together with 10812407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10812401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5406204 + 5406205.

It is an arithmetic number, because the mean of its divisors is an integer number (5406205).

Almost surely, 2^10812409 is an apocalyptic number.

It is an amenable number.

10812409 is a deficient number, since it is larger than the sum of its proper divisors (1).

10812409 is an equidigital number, since it uses as much as digits as its factorization.

10812409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 10812409 is about 3288.2227722586. Note that the first 3 decimals coincide. The cubic root of 10812409 is about 221.1265151951.

The spelling of 10812409 in words is "ten million, eight hundred twelve thousand, four hundred nine".