11671389 has 12 divisors (see below), whose sum is σ = 16931772. Its totient is φ = 7747200.

The previous prime is 11671379. The next prime is 11671397. The reversal of 11671389 is 98317611.

It can be written as a sum of positive squares in 2 ways, for example, as 6335289 + 5336100 = 2517^2 + 2310^2 .

It is not a de Polignac number, because 11671389 - 2⁹ = 11670877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11671349) 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 11 ways as a sum of consecutive naturals, for example, 522 + ... + 4859.

It is an arithmetic number, because the mean of its divisors is an integer number (1410981).

Almost surely, 2^11671389 is an apocalyptic number.

It is an amenable number.

11671389 is a deficient number, since it is larger than the sum of its proper divisors (5260383).

11671389 is a wasteful number, since it uses less digits than its factorization.

11671389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628 (or 5625 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 11671389 is about 3416.3414641982. The cubic root of 11671389 is about 226.8336675382.

It can be divided in two parts, 1167 and 1389, that added together give a triangular number (2556 = T₇₁).

The spelling of 11671389 in words is "eleven million, six hundred seventy-one thousand, three hundred eighty-nine".