11978459 has 2 divisors, whose sum is σ = 11978460. Its totient is φ = 11978458.

The previous prime is 11978443. The next prime is 11978503. The reversal of 11978459 is 95487911.

It is an a-pointer prime, because the next prime (11978503) can be obtained adding 11978459 to its sum of digits (44).

It is a weak prime.

It is an emirp because it is prime and its reverse (95487911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11978459 - 2⁴ = 11978443 is a prime.

It is a nialpdrome in base 8.

It is not a weakly prime, because it can be changed into another prime (11978419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5989229 + 5989230.

It is an arithmetic number, because the mean of its divisors is an integer number (5989230).

Almost surely, 2^11978459 is an apocalyptic number.

11978459 is a deficient number, since it is larger than the sum of its proper divisors (1).

11978459 is an equidigital number, since it uses as much as digits as its factorization.

11978459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 44.

The square root of 11978459 is about 3460.9910430396. The cubic root of 11978459 is about 228.8057759618.

The spelling of 11978459 in words is "eleven million, nine hundred seventy-eight thousand, four hundred fifty-nine".