67390399 has 2 divisors, whose sum is σ = 67390400. Its totient is φ = 67390398.

The previous prime is 67390387. The next prime is 67390423. The reversal of 67390399 is 99309376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67390399 - 2¹¹ = 67388351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67390319) 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, 33695199 + 33695200.

It is an arithmetic number, because the mean of its divisors is an integer number (33695200).

Almost surely, 2^67390399 is an apocalyptic number.

67390399 is a deficient number, since it is larger than the sum of its proper divisors (1).

67390399 is an equidigital number, since it uses as much as digits as its factorization.

67390399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562, while the sum is 46.

The square root of 67390399 is about 8209.1655483368. The cubic root of 67390399 is about 406.9421505997.

The spelling of 67390399 in words is "sixty-seven million, three hundred ninety thousand, three hundred ninety-nine".