11911667 has 2 divisors, whose sum is σ = 11911668. Its totient is φ = 11911666.

The previous prime is 11911639. The next prime is 11911681. The reversal of 11911667 is 76611911.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11911667 is a prime.

It is not a weakly prime, because it can be changed into another prime (11911567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5955833 + 5955834.

It is an arithmetic number, because the mean of its divisors is an integer number (5955834).

Almost surely, 2^11911667 is an apocalyptic number.

11911667 is a deficient number, since it is larger than the sum of its proper divisors (1).

11911667 is an equidigital number, since it uses as much as digits as its factorization.

11911667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 32.

The square root of 11911667 is about 3451.3282950192. The cubic root of 11911667 is about 228.3797086734.

The spelling of 11911667 in words is "eleven million, nine hundred eleven thousand, six hundred sixty-seven".