67349881 has 2 divisors, whose sum is σ = 67349882. Its totient is φ = 67349880.

The previous prime is 67349797. The next prime is 67349899. The reversal of 67349881 is 18894376.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44156025 + 23193856 = 6645^2 + 4816^2 .

It is a cyclic number.

It is not a de Polignac number, because 67349881 - 2⁷ = 67349753 is a prime.

It is a super-2 number, since 2×67349881² = 9072012941428322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64349881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33674940 + 33674941.

It is an arithmetic number, because the mean of its divisors is an integer number (33674941).

Almost surely, 2^67349881 is an apocalyptic number.

It is an amenable number.

67349881 is a deficient number, since it is larger than the sum of its proper divisors (1).

67349881 is an equidigital number, since it uses as much as digits as its factorization.

67349881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 67349881 is about 8206.6973259649. The cubic root of 67349881 is about 406.8605772206.

The spelling of 67349881 in words is "sixty-seven million, three hundred forty-nine thousand, eight hundred eighty-one".