67312207 has 2 divisors, whose sum is σ = 67312208. Its totient is φ = 67312206.

The previous prime is 67312183. The next prime is 67312211. The reversal of 67312207 is 70221376.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67312207 is a prime.

It is a super-2 number, since 2×67312207² = 9061866422421698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67312247) 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, 33656103 + 33656104.

It is an arithmetic number, because the mean of its divisors is an integer number (33656104).

Almost surely, 2^67312207 is an apocalyptic number.

67312207 is a deficient number, since it is larger than the sum of its proper divisors (1).

67312207 is an equidigital number, since it uses as much as digits as its factorization.

67312207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 67312207 is about 8204.4016844618. The cubic root of 67312207 is about 406.7847002029.

It can be divided in two parts, 673 and 12207, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 67312207 in words is "sixty-seven million, three hundred twelve thousand, two hundred seven".