11428609 has 2 divisors, whose sum is σ = 11428610. Its totient is φ = 11428608.

The previous prime is 11428601. The next prime is 11428621. The reversal of 11428609 is 90682411.

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., 7924225 + 3504384 = 2815^2 + 1872^2 .

It is a cyclic number.

It is not a de Polignac number, because 11428609 - 2³ = 11428601 is a prime.

It is a super-2 number, since 2×11428609² = 261226207349762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11428601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5714304 + 5714305.

It is an arithmetic number, because the mean of its divisors is an integer number (5714305).

Almost surely, 2^11428609 is an apocalyptic number.

It is an amenable number.

11428609 is a deficient number, since it is larger than the sum of its proper divisors (1).

11428609 is an equidigital number, since it uses as much as digits as its factorization.

11428609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 11428609 is about 3380.6225757987. The cubic root of 11428609 is about 225.2498229244.

The spelling of 11428609 in words is "eleven million, four hundred twenty-eight thousand, six hundred nine".