11887979 has 2 divisors, whose sum is σ = 11887980. Its totient is φ = 11887978.

The previous prime is 11887963. The next prime is 11888017. The reversal of 11887979 is 97978811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11887979 - 2⁴ = 11887963 is a prime.

It is not a weakly prime, because it can be changed into another prime (11887919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5943989 + 5943990.

It is an arithmetic number, because the mean of its divisors is an integer number (5943990).

Almost surely, 2^11887979 is an apocalyptic number.

11887979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11887979 is an equidigital number, since it uses as much as digits as its factorization.

11887979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 50.

The square root of 11887979 is about 3447.8948649865. The cubic root of 11887979 is about 228.2282199806.

The spelling of 11887979 in words is "eleven million, eight hundred eighty-seven thousand, nine hundred seventy-nine".