67387669 has 2 divisors, whose sum is σ = 67387670. Its totient is φ = 67387668.

The previous prime is 67387657. The next prime is 67387679. The reversal of 67387669 is 96678376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65399569 + 1988100 = 8087^2 + 1410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67387669 is a prime.

It is a super-2 number, since 2×67387669² = 9082195866507122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67387679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33693834 + 33693835.

It is an arithmetic number, because the mean of its divisors is an integer number (33693835).

Almost surely, 2^67387669 is an apocalyptic number.

It is an amenable number.

67387669 is a deficient number, since it is larger than the sum of its proper divisors (1).

67387669 is an equidigital number, since it uses as much as digits as its factorization.

67387669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 52.

The square root of 67387669 is about 8208.9992690949. Note that the first 3 decimals coincide. The cubic root of 67387669 is about 406.9366554199.

The spelling of 67387669 in words is "sixty-seven million, three hundred eighty-seven thousand, six hundred sixty-nine".