11423649 has 4 divisors (see below), whose sum is σ = 15231536. Its totient is φ = 7615764.

The previous prime is 11423647. The next prime is 11423669. The reversal of 11423649 is 94632411.

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 not a de Polignac number, because 11423649 - 2¹ = 11423647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11423647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1903939 + ... + 1903944.

It is an arithmetic number, because the mean of its divisors is an integer number (3807884).

Almost surely, 2^11423649 is an apocalyptic number.

It is an amenable number.

11423649 is a deficient number, since it is larger than the sum of its proper divisors (3807887).

11423649 is an equidigital number, since it uses as much as digits as its factorization.

11423649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807886.

The product of its digits is 5184, while the sum is 30.

The square root of 11423649 is about 3379.8889034996. Note that the first 3 decimals coincide. The cubic root of 11423649 is about 225.2172321753.

It can be divided in two parts, 11 and 423649, that added together give a triangular number (423660 = T₉₂₀).

The spelling of 11423649 in words is "eleven million, four hundred twenty-three thousand, six hundred forty-nine".