67275991 has 2 divisors, whose sum is σ = 67275992. Its totient is φ = 67275990.

The previous prime is 67275977. The next prime is 67276003. The reversal of 67275991 is 19957276.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67275991 - 2¹⁷ = 67144919 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67275931) 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, 33637995 + 33637996.

It is an arithmetic number, because the mean of its divisors is an integer number (33637996).

Almost surely, 2^67275991 is an apocalyptic number.

67275991 is a deficient number, since it is larger than the sum of its proper divisors (1).

67275991 is an equidigital number, since it uses as much as digits as its factorization.

67275991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 46.

The square root of 67275991 is about 8202.1942795815. The cubic root of 67275991 is about 406.7117329644.

The spelling of 67275991 in words is "sixty-seven million, two hundred seventy-five thousand, nine hundred ninety-one".