11478989 has 2 divisors, whose sum is σ = 11478990. Its totient is φ = 11478988.

The previous prime is 11478967. The next prime is 11478997. The reversal of 11478989 is 98987411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7645225 + 3833764 = 2765^2 + 1958^2 .

It is a cyclic number.

It is not a de Polignac number, because 11478989 - 2¹⁶ = 11413453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11478889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5739494 + 5739495.

It is an arithmetic number, because the mean of its divisors is an integer number (5739495).

Almost surely, 2^11478989 is an apocalyptic number.

It is an amenable number.

11478989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11478989 is an equidigital number, since it uses as much as digits as its factorization.

11478989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 47.

The square root of 11478989 is about 3388.0656723269. The cubic root of 11478989 is about 225.5803225150.

The spelling of 11478989 in words is "eleven million, four hundred seventy-eight thousand, nine hundred eighty-nine".