11869649 has 4 divisors (see below), whose sum is σ = 12948720. Its totient is φ = 10790580.

The previous prime is 11869639. The next prime is 11869667. The reversal of 11869649 is 94696811.

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: 94696811 = 11 ⋅8608801.

It is a cyclic number.

It is not a de Polignac number, because 11869649 - 2⁸ = 11869393 is a prime.

It is a super-3 number, since 3×11869649³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11869609) 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, 539519 + ... + 539540.

It is an arithmetic number, because the mean of its divisors is an integer number (3237180).

Almost surely, 2^11869649 is an apocalyptic number.

It is an amenable number.

11869649 is a deficient number, since it is larger than the sum of its proper divisors (1079071).

11869649 is a wasteful number, since it uses less digits than its factorization.

11869649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079070.

The product of its digits is 93312, while the sum is 44.

The square root of 11869649 is about 3445.2356958559. The cubic root of 11869649 is about 228.1108584216.

The spelling of 11869649 in words is "eleven million, eight hundred sixty-nine thousand, six hundred forty-nine".