67731943 has 2 divisors, whose sum is σ = 67731944. Its totient is φ = 67731942.

The previous prime is 67731929. The next prime is 67731953. The reversal of 67731943 is 34913776.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67731943 - 2⁹ = 67731431 is a prime.

It is a super-2 number, since 2×67731943² = 9175232205110498, which contains 22 as substring.

It is equal to p_3992467 and since 67731943 and 3992467 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 67731896 and 67731905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67731953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33865971 + 33865972.

It is an arithmetic number, because the mean of its divisors is an integer number (33865972).

Almost surely, 2^67731943 is an apocalyptic number.

67731943 is a deficient number, since it is larger than the sum of its proper divisors (1).

67731943 is an equidigital number, since it uses as much as digits as its factorization.

67731943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 40.

The square root of 67731943 is about 8229.9418588469. The cubic root of 67731943 is about 407.6284724209.

The spelling of 67731943 in words is "sixty-seven million, seven hundred thirty-one thousand, nine hundred forty-three".