19132409 has 4 divisors (see below), whose sum is σ = 19194240. Its totient is φ = 19070580.

The previous prime is 19132403. The next prime is 19132427. The reversal of 19132409 is 90423191.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90423191 = 2557 ⋅35363.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19132409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19132403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30449 + ... + 31070.

It is an arithmetic number, because the mean of its divisors is an integer number (4798560).

Almost surely, 2^19132409 is an apocalyptic number.

It is an amenable number.

19132409 is a deficient number, since it is larger than the sum of its proper divisors (61831).

19132409 is an equidigital number, since it uses as much as digits as its factorization.

19132409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61830.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 19132409 is about 4374.0609277878. The cubic root of 19132409 is about 267.4585908476.

The spelling of 19132409 in words is "nineteen million, one hundred thirty-two thousand, four hundred nine".