11967979 has 2 divisors, whose sum is σ = 11967980. Its totient is φ = 11967978.

The previous prime is 11967971. The next prime is 11967997. The reversal of 11967979 is 97976911.

It is a happy number.

Together with next prime (11967997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11967979 - 2³ = 11967971 is a prime.

It is not a weakly prime, because it can be changed into another prime (11967971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5983989 + 5983990.

It is an arithmetic number, because the mean of its divisors is an integer number (5983990).

Almost surely, 2^11967979 is an apocalyptic number.

11967979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11967979 is an equidigital number, since it uses as much as digits as its factorization.

11967979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 214326, while the sum is 49.

The square root of 11967979 is about 3459.4766945305. The cubic root of 11967979 is about 228.7390288068.

The spelling of 11967979 in words is "eleven million, nine hundred sixty-seven thousand, nine hundred seventy-nine".