11019409 has 4 divisors (see below), whose sum is σ = 11106304. Its totient is φ = 10932516.

The previous prime is 11019367. The next prime is 11019443. The reversal of 11019409 is 90491011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11019409 - 2⁹ = 11018897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11019469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43257 + ... + 43510.

It is an arithmetic number, because the mean of its divisors is an integer number (2776576).

Almost surely, 2^11019409 is an apocalyptic number.

It is an amenable number.

11019409 is a deficient number, since it is larger than the sum of its proper divisors (86895).

11019409 is an equidigital number, since it uses as much as digits as its factorization.

11019409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86894.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 11019409 is about 3319.5495176304. The cubic root of 11019409 is about 222.5287359258.

The spelling of 11019409 in words is "eleven million, nineteen thousand, four hundred nine".