67403993 has 2 divisors, whose sum is σ = 67403994. Its totient is φ = 67403992.

The previous prime is 67403983. The next prime is 67404011. The reversal of 67403993 is 39930476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65983129 + 1420864 = 8123^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 67403993 - 2⁸ = 67403737 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67403993.

It is not a weakly prime, because it can be changed into another prime (67403983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33701996 + 33701997.

It is an arithmetic number, because the mean of its divisors is an integer number (33701997).

Almost surely, 2^67403993 is an apocalyptic number.

It is an amenable number.

67403993 is a deficient number, since it is larger than the sum of its proper divisors (1).

67403993 is an equidigital number, since it uses as much as digits as its factorization.

67403993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 67403993 is about 8209.9934835541. The cubic root of 67403993 is about 406.9695115677.

The spelling of 67403993 in words is "sixty-seven million, four hundred three thousand, nine hundred ninety-three".