67540093 has 2 divisors, whose sum is σ = 67540094. Its totient is φ = 67540092.

The previous prime is 67540069. The next prime is 67540127. The reversal of 67540093 is 39004576.

It is an a-pointer prime, because the next prime (67540127) can be obtained adding 67540093 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67272804 + 267289 = 8202^2 + 517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67540093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67540393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33770046 + 33770047.

It is an arithmetic number, because the mean of its divisors is an integer number (33770047).

Almost surely, 2^67540093 is an apocalyptic number.

It is an amenable number.

67540093 is a deficient number, since it is larger than the sum of its proper divisors (1).

67540093 is an equidigital number, since it uses as much as digits as its factorization.

67540093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 67540093 is about 8218.2779826433. The cubic root of 67540093 is about 407.2432407155.

The spelling of 67540093 in words is "sixty-seven million, five hundred forty thousand, ninety-three".