67783631 has 2 divisors, whose sum is σ = 67783632. Its totient is φ = 67783630.

The previous prime is 67783603. The next prime is 67783633. The reversal of 67783631 is 13638776.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67783631 - 2¹⁰ = 67782607 is a prime.

It is a super-2 number, since 2×67783631² = 9189241263088322, which contains 22 as substring.

Together with 67783633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67783633) 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, 33891815 + 33891816.

It is an arithmetic number, because the mean of its divisors is an integer number (33891816).

Almost surely, 2^67783631 is an apocalyptic number.

67783631 is a deficient number, since it is larger than the sum of its proper divisors (1).

67783631 is an equidigital number, since it uses as much as digits as its factorization.

67783631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 67783631 is about 8233.0815008720. The cubic root of 67783631 is about 407.7321366708.

The spelling of 67783631 in words is "sixty-seven million, seven hundred eighty-three thousand, six hundred thirty-one".