11899967 has 2 divisors, whose sum is σ = 11899968. Its totient is φ = 11899966.

The previous prime is 11899933. The next prime is 11899969. The reversal of 11899967 is 76999811.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11899967 is a prime.

Together with 11899969, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11899969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5949983 + 5949984.

It is an arithmetic number, because the mean of its divisors is an integer number (5949984).

Almost surely, 2^11899967 is an apocalyptic number.

11899967 is a deficient number, since it is larger than the sum of its proper divisors (1).

11899967 is an equidigital number, since it uses as much as digits as its factorization.

11899967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 50.

The square root of 11899967 is about 3449.6328790177. The cubic root of 11899967 is about 228.3049103567.

The spelling of 11899967 in words is "eleven million, eight hundred ninety-nine thousand, nine hundred sixty-seven".