667212943 has 2 divisors, whose sum is σ = 667212944. Its totient is φ = 667212942.

The previous prime is 667212941. The next prime is 667213007. The reversal of 667212943 is 349212766.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667212943 - 2¹ = 667212941 is a prime.

It is a super-2 number, since 2×667212943² = 890346222613442498, which contains 22 as substring.

Together with 667212941, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 667212896 and 667212905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667212941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333606471 + 333606472.

It is an arithmetic number, because the mean of its divisors is an integer number (333606472).

Almost surely, 2^667212943 is an apocalyptic number.

667212943 is a deficient number, since it is larger than the sum of its proper divisors (1).

667212943 is an equidigital number, since it uses as much as digits as its factorization.

667212943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 667212943 is about 25830.4654042470. The cubic root of 667212943 is about 873.8190077595.

The spelling of 667212943 in words is "six hundred sixty-seven million, two hundred twelve thousand, nine hundred forty-three".