67213669 has 2 divisors, whose sum is σ = 67213670. Its totient is φ = 67213668.

The previous prime is 67213609. The next prime is 67213681. The reversal of 67213669 is 96631276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 16305444 = 7135^2 + 4038^2 .

It is a cyclic number.

It is not a de Polignac number, because 67213669 - 2⁷ = 67213541 is a prime.

It is a super-2 number, since 2×67213669² = 9035354600883122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67213609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33606834 + 33606835.

It is an arithmetic number, because the mean of its divisors is an integer number (33606835).

Almost surely, 2^67213669 is an apocalyptic number.

It is an amenable number.

67213669 is a deficient number, since it is larger than the sum of its proper divisors (1).

67213669 is an equidigital number, since it uses as much as digits as its factorization.

67213669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 67213669 is about 8198.3942940066. The cubic root of 67213669 is about 406.5861065750.

It can be divided in two parts, 672 and 13669, that added together give a palindrome (14341).

The spelling of 67213669 in words is "sixty-seven million, two hundred thirteen thousand, six hundred sixty-nine".