67859993 has 2 divisors, whose sum is σ = 67859994. Its totient is φ = 67859992.

The previous prime is 67859989. The next prime is 67860007. The reversal of 67859993 is 39995876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45657049 + 22202944 = 6757^2 + 4712^2 .

It is a cyclic number.

It is not a de Polignac number, because 67859993 - 2² = 67859989 is a prime.

It is not a weakly prime, because it can be changed into another prime (67859933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33929996 + 33929997.

It is an arithmetic number, because the mean of its divisors is an integer number (33929997).

Almost surely, 2^67859993 is an apocalyptic number.

It is an amenable number.

67859993 is a deficient number, since it is larger than the sum of its proper divisors (1).

67859993 is an equidigital number, since it uses as much as digits as its factorization.

67859993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 56.

The square root of 67859993 is about 8237.7177057726. The cubic root of 67859993 is about 407.8851901264.

The spelling of 67859993 in words is "sixty-seven million, eight hundred fifty-nine thousand, nine hundred ninety-three".