67995643 has 2 divisors, whose sum is σ = 67995644. Its totient is φ = 67995642.

The previous prime is 67995619. The next prime is 67995701. The reversal of 67995643 is 34659976.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67995643 is a prime.

It is not a weakly prime, because it can be changed into another prime (67995043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33997821 + 33997822.

It is an arithmetic number, because the mean of its divisors is an integer number (33997822).

Almost surely, 2^67995643 is an apocalyptic number.

67995643 is a deficient number, since it is larger than the sum of its proper divisors (1).

67995643 is an equidigital number, since it uses as much as digits as its factorization.

67995643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 49.

The square root of 67995643 is about 8245.9470650738. The cubic root of 67995643 is about 408.1567924706.

The spelling of 67995643 in words is "sixty-seven million, nine hundred ninety-five thousand, six hundred forty-three".