67638383 has 2 divisors, whose sum is σ = 67638384. Its totient is φ = 67638382.

The previous prime is 67638379. The next prime is 67638409. The reversal of 67638383 is 38383676.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67638383 - 2² = 67638379 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67638983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33819191 + 33819192.

It is an arithmetic number, because the mean of its divisors is an integer number (33819192).

Almost surely, 2^67638383 is an apocalyptic number.

67638383 is a deficient number, since it is larger than the sum of its proper divisors (1).

67638383 is an equidigital number, since it uses as much as digits as its factorization.

67638383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 44.

The square root of 67638383 is about 8224.2557718009. The cubic root of 67638383 is about 407.4406964523.

The spelling of 67638383 in words is "sixty-seven million, six hundred thirty-eight thousand, three hundred eighty-three".